Dear Friends

Philosophy of Isolation

High-school student Rina maintains a cynical philosophy about human relationships. She believes friends are unnecessary except as tools to be used when needed, then discarded. This worldview prevents her from developing genuine connections with classmates or maintaining meaningful friendships. Her transactional approach to relationships creates a pattern of exploitation and betrayal that isolates her even while surrounded by people.

Rina's family dynamics mirror her social dysfunction. Her father demonstrates little interest in family life, remaining emotionally distant and uninvolved. Her mother swings to the opposite extreme, becoming over-protective in ways that suffocate rather than nurture. Neither parent provides the emotional foundation Rina needs to develop healthy relationship skills.

Rina spends considerable time at a Shibuya nightclub where Yousuke works as a disc jockey. She frequents the venue with two girls she calls friends: Hiroko and Emi. However, the opening scene immediately establishes Rina's casual cruelty—she has "borrowed" Hiroko's boyfriend for sex, an act of betrayal that infuriates Hiroko but which Rina treats as insignificant.

Yousuke develops romantic feelings for Rina despite witnessing her feral behavior and emotional unavailability. They engage in physical intimacy, necking at the club, but stop short of having sex. Yousuke seems drawn to Rina despite—or perhaps because of—her damaged nature.

Manipulation and Collapse

Rina executes a calculated fraud to obtain money. She tells a young man she is pregnant with his child, then demands payment for an abortion. The man is neither Hiroko's boyfriend nor Yousuke, suggesting Rina maintains multiple sexual relationships simultaneously. The lie succeeds and Rina receives a substantial sum.

Rather than using the money responsibly, Rina purchases an expensive bottle of Dom Pérignon champagne and brings it to the club. In a gesture of performative excess, she sprays the champagne over everyone on the dance floor, wasting hundreds of dollars worth of alcohol for momentary attention. Shortly after this display, Rina collapses.

Medical examination reveals devastating news: Rina has non-Hodgkin lymphoma, a form of cancer. She requires hospitalization for an indefinite period as doctors begin aggressive treatment. Her family does not visit her in the hospital, maintaining their pattern of emotional neglect even during medical crisis.

Unexpected Connection

One of Rina's classmates, Maki, begins visiting her regularly at the hospital. Maki explains they were friends in primary school, though Rina has no memory of this earlier relationship. Maki uses this claimed shared history as an opportunity to reconnect with Rina, though whether they were actually childhood friends remains ambiguous.

Another hospitalized patient, a young girl named Kanae, attempts to befriend Rina. Despite being a child facing her own serious illness, Kanae reaches out with genuine warmth. However, Rina clings stubbornly to her philosophy that friends are unnecessary, rejecting Kanae's overtures.

Physical Deterioration

Throughout hospitalization, Rina's physical condition deteriorates visibly. Chemotherapy causes her hair to fall out. Her skin becomes pale and her body grows thin from the disease and treatment side effects. The transformation from confident clubgoer to frail cancer patient strips away the superficial aspects of Rina's identity.

Rina learns that Kanae also suffered from cancer—specifically leukemia. Kanae underwent a bone marrow transplant in hopes of survival, but the procedure failed and Kanae died. The death of the young girl who had tried to befriend her confronts Rina with mortality and the consequences of isolation.

Rina's cancer has metastasized to her left breast, requiring a mastectomy. The surgical removal of her breast represents not just physical trauma but an assault on her femininity and the body she used as currency in her manipulative relationships.

Suicide Attempt

Facing hair loss, physical weakness, surgical disfigurement, and the death of Kanae, Rina loses hope entirely. She decides to commit suicide by jumping from the hospital rooftop. She climbs to the roof and prepares to jump, seeking escape from her suffering.

Before Rina can leap, Maki appears and confronts her. In a shocking act, Maki stabs herself in the chest with a knife. She declares she will share Rina's pain and that she refuses to lose her friend. Maki has suicidal tendencies herself—scars on her wrists evidence previous attempts—but claims her relationship with Rina gives her reason to continue living.

The dramatic intervention forces Rina to recognize that someone values her existence enough to harm themselves to prevent her death. Rina experiences renewed hope, realizing that genuine friendship with Maki might be possible. However, as Maki recovers from the self-inflicted stab wound, Rina does not see her.

False Friends

Hiroko and Emi visit Rina in the hospital ward. During this visit, Hiroko reveals her ongoing resentment about Rina sleeping with her boyfriend. Yousuke had written a love letter to Rina and given it to Hiroko to deliver. Hiroko throws the letter away and lies to Rina, claiming she and Emi had three-way sex with Yousuke. Emi, hearing this fabrication for the first time, acknowledges it anyway to support Hiroko's revenge.

The cruel lie demonstrates the shallow, toxic nature of Rina's pre-cancer friendships. These relationships were built on mutual exploitation rather than genuine care, and Rina's vulnerability brings out cruelty rather than compassion.

Return and Rejection

After completing treatment, doctors discharge Rina from the hospital. She attempts to return to her previous party lifestyle but discovers she cannot force herself to behave as she once did. The cancer experience has fundamentally changed her, making her former behaviors feel hollow.

Rina returns to the Shibuya club where Emi apologizes for the hospital visit. Emi claims Hiroko pressured her into supporting the lie about Yousuke. Emi also reveals that Hiroko overdosed on drugs, adding another tragedy to the accumulating casualties of their lifestyle.

Rina decides she is ready to have sex with Yousuke, perhaps seeking validation or connection through physical intimacy. However, when Yousuke sees Rina's mastectomy scar, he hesitates and has second thoughts. His reaction to her disfigurement demonstrates that his attraction was superficial, unable to accept Rina's altered body.

True Friendship

Rejected by Yousuke and unable to return to her former life, Rina climbs to the hospital rooftop again to attempt suicide. The head nurse stops her before she can jump. The nurse tells Rina that Maki wanted her to live, but Rina protests that Maki has not visited her recently.

Another nurse then pushes Maki onto the rooftop in a wheelchair. Maki appears zombie-like, her condition having severely deteriorated. She explains that the only reason she continues living is to spend time with friends like Rina. Maki suffers from a terminal illness: an unspecified neurodegenerative disease that progressively destroys her nervous system.

Seeing Maki's determination to live despite her fatal condition and her sincere declaration of friendship transforms Rina completely. For the first time, she understands that friendship can provide genuine meaning and purpose rather than just transactional utility.

Redemption Through Service

Rina discovers her purpose in life through caring for others. Having fully recovered from cancer, she applies to nursing school and is accepted. She becomes a nurse specifically to care for Maki during her final days, reversing their earlier relationship where Maki provided emotional support to Rina.

Rina dedicates herself to Maki's comfort and dignity as the neurodegenerative disease progresses. After three months of this compassionate care, Maki dies. Through losing her first true friend, Rina has learned what friendship actually means—not exploitation or manipulation, but selfless care and genuine connection that persists even through suffering and death.