Stolen Love, High School Teacher(2021)

奪い愛、高校教師

Tsuyuko Hoshino, a nurse, meets high school teacher Santa Fuyuno at a café for musicians and immediately falls for him. Despite knowing he is engaged, she becomes obsessed with him. Unbeknownst to her, her own daughter Akari is taught flute by Santa and their relationships develops beyond that of teacher and student.