“Living things are such a bother. They require care, and they spoil.”
— Tsugumi reflecting on her pet fish.

Genre
Young Adult
Reading Time
150 min
Key Themes
See below
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A summer by the sea with her often ill, manipulative cousin Tsugumi makes Maria understand family, love, and loss before she moves to Tokyo.
Maria is packing to move to Tokyo with her mother and her father, who has finally acknowledged them. She has lived her whole life at the Shirahama Seaside Inn, owned by her aunt and uncle, and run by her mother and aunt. Maria thinks about her unusual family – her mother is unmarried, and her wealthy father is now making amends. Her childhood has always involved her cousin Tsugumi, a fragile but strong-willed girl who has been central to their lives because of her chronic illness. As Maria gets ready to leave, she feels both excited for a new life and nostalgic for the familiar, quirky world she knows, especially her bond with Tsugumi.
After settling in Tokyo, attending university, and experiencing a more typical family life with her parents, Maria gets a call from Tsugumi. Tsugumi, with her usual directness, invites Maria to spend one last summer at the Shirahama Seaside Inn. Tsugumi says she needs Maria there, suggesting she wants company before Maria fully enters her adult life. Maria, despite her first doubts and their complicated relationship, agrees. This invitation brings Maria back to the seaside, a place she thought she had left, and rekindles the strong bond between the cousins.
Maria arrives back at the Shirahama Seaside Inn, a place full of childhood memories and Tsugumi's antics. The inn, with its quirky staff and relaxed feel, is both comforting and a bit stifling after her taste of Tokyo independence. She is immediately drawn back into Tsugumi's world, seeing her cousin's usual mix of charm, manipulation, and delicate health. Maria reconnects with the inn's other residents, including her aunt and uncle, and the staff, who all treat Tsugumi with a mix of frustration and deep affection. The summer begins, promising a time of reflection and re-evaluation for Maria as she looks at her past and future.
One evening, Tsugumi, unusually quiet and serious, tells Maria her deep feelings for Kyoichi, a local boy who works at the inn and has always been kind to her. Tsugumi, usually guarded and cynical about her future due to her illness, expresses a rare hope for happiness. Later, Kyoichi, despite Tsugumi's illness and difficult personality, proposes marriage to her. This proposal makes Tsugumi face her own mortality and her ability to love, and it changes Maria's view of her cousin's emotions. The news spreads through the small community, showing Tsugumi's impact on everyone around her.
A small engagement party is held for Tsugumi and Kyoichi at the inn. Despite the happy occasion, Tsugumi struggles with the emotional weight of it. She becomes overwhelmed, her usual spirited manner breaking down under the stress of her illness and the uncertainty of her future with Kyoichi. Her health visibly worsens, and she collapses, needing urgent medical care. This incident is a sharp reminder of Tsugumi's fragile health and the constant threat of her condition. It deeply affects Maria, who sees her cousin's vulnerability firsthand, reinforcing how precious and fragile Tsugumi's life is.
After Tsugumi's collapse, Maria spends time thinking about their long, complicated relationship. She thinks about Tsugumi's strength, resilience, and occasional cruelty, all stemming from her lifelong illness. Maria realizes how much she loves Tsugumi, acknowledging that her cousin's presence has shaped who she is. She grapples with the understanding that Tsugumi's life is limited and that she might lose her at any time. This reflection leads Maria to accept Tsugumi as she is, embracing both her flaws and her unique spirit, and cherishing their time together.
Despite her recent health scare, Tsugumi, with her typical determination, insists on going to the beach one last time with Maria and Kyoichi. The outing is a touching moment, as Tsugumi, though physically weak, shows a strong will to experience life fully. She finds joy in simply being by the sea, a place that has always been her refuge. This scene highlights Tsugumi's spirit and her refusal to be defined only by her illness. For Maria, seeing Tsugumi's resolve is both sad and inspiring, solidifying her admiration for her cousin's strength in hardship.
Tsugumi suffers another, even more severe medical emergency, leading to critical hospitalization. The family, including Maria, gathers at the hospital, fearing the worst. The doctors are grim, and there is a real chance Tsugumi might not survive. This event is the peak of Tsugumi's struggle with her illness, pushing her and her family to their emotional limits. Maria experiences intense fear and grief, facing the real possibility of losing her cousin. This near-death experience forces everyone to acknowledge how fragile life is and the deep impact Tsugumi has had on them.
Against the doctors' expectations and the family's despair, Tsugumi begins to recover. Her condition stabilizes, and slowly, she starts to regain her strength. This recovery brings immense relief and joy to Maria, Kyoichi, and the rest of the family. The experience deepens their appreciation for Tsugumi's toughness and the preciousness of her life. While Tsugumi's health remains fragile, this recovery offers renewed hope and a deep understanding of her unique resilience. Maria sees this as proof of Tsugumi's powerful will to live and her lasting connection to the world.
As summer ends, Maria prepares for her final departure from Shirahama, now with a changed outlook. Her experiences with Tsugumi, Kyoichi, and the inn's residents have redefined her understanding of home, family, and love. She realizes that 'family' is not just about blood or traditional structures, but about deep, complex connections and shared history. Maria leaves with a renewed sense of self and a deeper appreciation for the unique, unconventional family she has always had. She understands that while she is moving forward, the essence of Tsugumi and Shirahama will always be a part of her.
Tsugumi stays at the Shirahama Seaside Inn, her health still delicate but her spirit strong. She and Kyoichi continue their relationship, building a future together despite uncertainties. The inn and the seaside town remain Tsugumi's world, a place where she is loved and understood. Maria, though physically distant, carries the lasting impression of Tsugumi's friendship. Their bond, formed in childhood and tested by illness and separation, remains strong, showing the powerful and transformative nature of their connection. Maria understands that Tsugumi, with her unique mix of fragility and strength, will always be an important part of her life story.
The Protagonist
Maria moves from a state of quiet observation and slight detachment to a profound understanding and acceptance of her unique family and the meaning of home.
The Antagonist/Supporting
Tsugumi, initially using her illness as a shield and weapon, gradually opens up to love and confronts her own mortality, finding a fragile hope for a future.
The Supporting
Kyoichi remains a steady, loving presence, offering Tsugumi a chance at a normal life and unwavering support.
The Supporting
She provides consistent, unconditional love and support to Maria, embodying quiet strength and adaptability.
The Supporting
She consistently provides a loving, albeit overprotective, environment for Tsugumi.
The Supporting
He serves as a consistent, grounding figure for his family, particularly for Tsugumi.
The novel explores what 'home' and 'family' mean beyond traditional ideas. Maria's upbringing in the unconventional Shirahama Seaside Inn, with an unmarried mother and an ill cousin, challenges social norms. Her move to Tokyo offers a glimpse of a 'normal' family, but her return to the inn solidifies her understanding. Home is not just a place or a typical structure, but the complex web of relationships, shared history, and unconditional love, even if those relationships are messy. The inn, with its eccentric residents and Tsugumi, becomes Maria's true anchor. For example, Maria realizes that her true family is the collective, unconventional unit at the inn, not just her biological parents.
“What I knew was that no matter what happened, my home was there. It was a place where I was loved, where I could be myself.”
This theme is shown mostly through Tsugumi, whose chronic illness constantly reminds everyone how fragile life is. Her near-death experiences highlight how delicate existence can be, yet her strong spirit and fierce will to live show incredible resilience. Tsugumi's ability to find joy, fall in love, and keep her personality despite her physical limits shows the human spirit's capacity to endure. Her struggles make Maria and the other characters face mortality and appreciate each moment. For instance, Tsugumi's insistence on a beach outing after a severe health scare shows her resilience.
“Tsugumi, who lived with death always at her side, taught me that life was something to be lived intensely, with every fiber of your being.”
The relationship between Maria and Tsugumi is central to this theme. Their bond is deep, loving, and codependent, but also marked by Tsugumi's occasional cruelty and Maria's quiet resentment. It is a friendship that defies easy labels, showing that love can exist alongside frustration, jealousy, and pain. Kyoichi's steady love for Tsugumi, despite her difficult personality and health, further explores this theme, showing a different aspect of acceptance and devotion. The novel suggests that true love and friendship embrace the whole person, flaws and all, and that these complex connections are ultimately enriching. Tsugumi's engagement to Kyoichi, despite her illness, shows that love can overcome physical limits and emotional difficulties.
“Our love was like a wound that never quite healed, always there, always throbbing, but it was ours.”
Maria's journey throughout the novel is a classic coming-of-age story. Her leaving the inn for Tokyo symbolizes her step into adulthood and independence. However, her return for a 'last summer' forces her to come to terms with her past and her identity, which is deeply tied to Tsugumi and the inn. Through seeing Tsugumi's struggles and triumphs, and her own thoughts, Maria gains a deeper understanding of herself, her values, and what matters to her. She learns to appreciate her unique background and to define 'adulthood' on her own terms, embracing life's complexities rather than seeking a conventional path. Her decision to return to the inn, despite her new life in Tokyo, is a key moment of self-discovery.
“I understood then that growing up wasn't about leaving things behind, but about carrying them with you, transformed.”
Provides an intimate, subjective lens into the story's events and characters.
Maria's first-person narration allows the reader to experience the story through her introspective and observant eyes. This perspective is crucial for understanding the nuanced dynamics of her relationship with Tsugumi, as Maria often reflects on her feelings of love, frustration, and admiration for her cousin. It also provides a filter through which the eccentricity of the Shirahama Seaside Inn and its inhabitants are presented, colored by Maria's unique upbringing and gentle sensibility. The subjective nature of her narrative invites empathy and allows for deep emotional connection with her journey of self-discovery.
A symbolic setting representing home, unconventional family, and a refuge from the outside world.
The inn is more than just a location; it functions as a central symbol of home, family, and a self-contained world. It represents Maria's roots, her unconventional upbringing, and the deep, complex bonds that define her. Its slightly rundown, informal atmosphere reflects the family's eccentricities and acceptance of difference. For Tsugumi, it is both a sanctuary and a prison, a place where she is loved and cared for, but also where her illness confines her. The inn serves as a constant backdrop for the characters' emotional journeys, embodying a sense of belonging that Maria ultimately chooses over a more conventional life.
A constant source of tension, driving plot points and revealing character depth.
Tsugumi's unnamed chronic illness is a pivotal plot device. It is the primary catalyst for her difficult personality, her need for control, and the constant worry that permeates the family. Her illness creates dramatic tension through her frequent health crises and near-death experiences, pushing the narrative forward and forcing characters to confront mortality. Crucially, it also acts as a profound character development tool, revealing Tsugumi's immense resilience and Maria's evolving understanding of love and compassion. It underscores the theme of life's fragility and the preciousness of existence, shaping every major event and relationship in the story.
Maria's past reflections provide context and emotional depth to present events.
Although the main narrative is set during Maria's 'last summer' at the inn, the story is interspersed with Maria's detailed flashbacks to her childhood with Tsugumi. These flashbacks are not merely nostalgic; they serve to illuminate the complex history of their relationship, explaining Tsugumi's personality and the foundation of their deep bond. By providing context to Tsugumi's past actions and Maria's long-held feelings, the flashbacks enrich the present-day events, allowing the reader to understand the emotional weight and significance of the current summer's occurrences and Maria's ultimate acceptance of her unique family.
“Living things are such a bother. They require care, and they spoil.”
— Tsugumi reflecting on her pet fish.
“Every time I think of her, I think of summer, the sea, and the smell of salt.”
— Maria describing her memories of Tsugumi.
“When you’re young, you can tolerate anything, even the most painful things.”
— Maria reflecting on the resilience of youth.
“There are some people who are like the sea itself. They are beautiful, sometimes calm, sometimes violent, but always deep.”
— Maria's metaphorical description of Tsugumi.
“Even if you're not strong, you can survive. You just have to endure.”
— A quiet observation about survival.
“No matter how much time passes, some things never change.”
— Maria contemplating the unchanging aspects of her hometown and relationships.
“The world is full of people who are trying to live, even if they are broken.”
— Maria's empathetic view of people around her.
“Sometimes, the most beautiful things are also the most fragile.”
— A reflection on delicate beauty.
“It’s strange how a small incident can change the entire color of your life.”
— Maria pondering the impact of seemingly minor events.
“The sea always makes me feel like everything is going to be alright.”
— Maria finding comfort and reassurance in the ocean.
“We all have our own little secrets, things we don’t want anyone to know.”
— Maria's thoughts on the private lives of individuals.
“Life is like a summer day, long and bright, but it always comes to an end.”
— A melancholic reflection on the transient nature of life.
“Even if you're not happy, you can still find joy in small things.”
— Maria's philosophy on finding happiness amidst difficulties.
“There are some wounds that never truly heal, they just become scars.”
— A poignant observation on enduring emotional pain.
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