High school student Irina is the student council president at her school. She is pretty, friendly and does her job well. So it’s no wonder she’s loved by her classmates. However, this is only a façade of her true, lustful self because Irina is a real masochist. And there is one boy, in particular, she wants as her “master”: Yuuji Sado. Ever since he caught Irina one day while she was in the process of masturbating in a class, he keeps giving her the same ice-cold look – and she just can’t resist it! So one day, she decides to confront him; and it goes better than expected … at least for Irina’s masochistic side.