Rei is unable to express her opinions well due to her introverted nature. Her time with her boyfriend, NAKAMURA, is calm but nothing passionate. One night, Rei strongly wishes that she could meet her real father, who was separated from her at an early age by her parents’ divorce. From that night onward, introverted Rei’s heart burns with an enduring passion. Through conversations with her mother, complicated memories, dreams and her reunion with her father, Rei’s thoughts about her family are gradually revealed.

When Yuki's classmate suddenly dies, rumors begin to spread about her death and the relationships between Yuki and her classmates are disrupted amidst grief and forced normalcy.

A goldfish in a tank, taken care of only by the protagonist, dies, and only then do the students feel sorry for it. In this world, people will be kind to you only when you die. Anne, ignored by her classmates, attends classes on the verge of breakdown, but when she meets Aina, who feels the same way, she smiles again.

Hana is on the athletic running team. She's furious. To forget about her pent up emotions towards her parents, best friend, and romance, she runs. Her love for running allows her to keep going.