After living abroad, Ayano Shindo returns to Japan as an English teacher. Standing at the lectern once again, she reflects on Japan's educational policy of "relaxed education," becoming internally conflicted upon realizing how it suppresses individual potential. Amid this, a student named Hisamichi, who dreams of studying overseas, places high hopes on Ayano's language skills and begins seeking her private guidance. Responding to his earnest request, Ayano invites him to her home for special one-on-one lessons. However, this decision stirs resentment among other students and awakens unexpected emotions within Hisamichi. Unaware of the consequences, Ayano finds herself drawn into an increasingly complex and dangerous relationship.