“My family fell apart long ago…” Kumi, 18, hit her father and no longer goes to school. She spends her days on a riverbank, which is also the favorite place of 28-year-old hostess Ryo, who owes money to Kumi’s father, Daikou. Even though Kumi considers Ryo, her father’s mistress, to be a sworn enemy, she begins to feel something of a connection with her and so comes to the riverbank to see her. Ryo hates Daikou for suddenly demanding she give back all the money he had given her, but despite this she too begins to feel a connection to Kumi, in whom she sees something of her own past. One day, Kumi meets Riyu, 17, a victim of online bullying. Unlike Kumi, Riyu continues to go to school despite a falling out with her ex-best friend, Saki. Kumi’s indifference proves strangely enticing to Riyu. Kumi and her mother, Kasumi, 40, stopped communicating with each other a long time ago. Kumi is cold to her mother, whose mental state gradually deteriorates, but at the same time does not know how to express herself. Daikou struggles with an impending lawsuit against him. Kasumi tries to revive her family by behaving as if everything was normal. Saki wishes she could make up with Riyu. All of their thoughts intertwine. For Kumi time has stopped since she hit her father. Riyu suffers as she tries to graduate high school. Ryo projects her own past onto Kumi’s present. Will they manage to get their lives back on track?