While "Seikou" most commonly refers to the 2013 OVA in this context, the name also appears in other media:
The story follows two friends, and Saori , who are preoccupied with the topic of sex but face different personal dilemmas. Seikou_Ep_01_SUB_ITA.mp4
A reserved girl who recently rejected a love confession from a classmate. Unknown to others, she has a secret relationship with a student from a neighboring class, which becomes strained when he demands more than she is comfortable with. While "Seikou" most commonly refers to the 2013