Bad Teacher's Equation

Atsushi Arisawa enrolls at Jougaouka High School with a single, heartfelt goal: to reunite with his childhood crush, Ma-chan, who now works as the school nurse. However, the sweet and gentle person he remembers has vanished entirely. In their place stands an adult whose personality has shifted so drastically that Atsushi can barely recognize them. This jarring transformation leaves him deeply confused, forcing him to confront a version of his beloved that defies every memory he holds dear. His situation grows even more complicated when his friend Kouji begins making romantic advances toward him. Despite this unexpected attention, Atsushi remains steadfastly focused on Ma-chan, hoping that by spending time with this unfamiliar, grown-up version of his childhood companion, he might discover someone worth loving all over again. Yet, just as he attempts to navigate these tangled feelings, a startling revelation throws everything into question. The nurse’s true name is not Masami, as Atsushi always believed, but Masayoshi—a detail that forces him to reevaluate everything he thought he knew about the person he came back for.