Mount Position!

Ichito, a high school teacher, believed that he was living with his lover until he caught his boyfriend involved with another person. He was taken aback when the enigmatic man who assisted him back to his apartment turned out to be Ryugasaki, the lover of his boyfriend's partner. In an outburst of fury, Ryugasaki asserts himself by forcing Ichito to "take responsibility" and then proceeds to take his innocence.