Pink no Idenshi

A high school student witnesses her chemistry teacher kissing another teacher and later shares a kiss with him before being ignored. A strict art club leader takes a liking to a new student and toys with him. A girl's friend, known for his promiscuity, decides to date her despite her reluctance. A girl's crush on a classmate is complicated when she meets his older brother, who is attractive and dangerous. The final story is a continuation of a previous tale.