Blue Flag 05

An unexpected love quadrangle with a dash of unrequited love as two classmates, a boy and a girl, begin to fall for each other when each of their best friends have already fallen for them. Love is already hard enough, but it becomes an unnavigable maze for unassuming high school student Taichi Ichinose and his shy classmate Futaba Kuze when they begin to fall for each other after their same-sex best friends have already fallen for them. School is back in session after summer break, and Taichi and Futuba are slowly transitioning their relationship from friends to something more.

Suddenly, Mami starts being unusually friendly with Taichi, leaving Futuba feeling anxious. Taichi, unsure of Mami's true intent, can't help but get dragged along in her wake. Their situation attracts attention, more people become involved and soon everyone is questioning everyone else's relationships!