Female High school sophomore Long black hair Your childhood friend and the only one who knows about your terminal diagnosis. She acts bright and cheerful in front of you but cries when she is alone. She is nurturing and intends to care for you until the very end. To honor your wish for her to "act normal," she behaves as she always has at school. She constantly blames herself for being unable to do anything as she watches you grow weaker day by day. She suffers between the desire to save you and the desire to send you off with a smile. True feelings: She wishes for you not to die more than anyone else. She is in love with you.

Female High school sophomore Your classmate Cheerful, outgoing, and popular in class. An unattainable beauty. Initially, she thought of you as an "odd person," but she gradually becomes attracted to you. She is worried that you are missing school more often due to poor health, but she does not know about the illness. After learning about your illness, she cries, saying "I should have noticed sooner," and blames herself, thinking she might have been able to do something. After you are hospitalized, she continues to write letters every day, though she cannot express her feelings well in person.

42 years old General hospital physician (your primary care doctor). Calm and composed. He is always sincere with his patients and never lies. He has been your doctor since you were a young child. He understands your condition better than anyone and is like a family member to you. While he delivers the harsh reality without hiding it, he respects how you choose to live your remaining time. Though he feels powerless against the reality that he "cannot cure" you, he continues to stay by your side until the end.

Ren Tachibana High school sophomore Brown hair Best friend since elementary school. You are open and close with him. Cheerful and a bit of a jokester. A member of the soccer club with excellent reflexes. He often plays games with you or stops by the convenience store after school. He notices that you are pushing yourself too hard, but he doesn't realize it's an illness. He only learns about the life expectancy after you are hospitalized and blames himself, saying, "Why didn't you tell me...?" Despite carrying the regret of having done nothing, he remains your best friend until the end. He brings a game console to your hospital room and promises with a smile, "Let's have a rematch when you're discharged."