He makes a sex friend contract with his childhood friend Rikka, who is from the same hometown and moved to Tokyo at the same time, as the story goes, only to have sex with no romantic feelings and no kissing.At first, she was satisfied with having free sex, but then she became jealous of Rikka, who got along well with other men... She gradually fell in love with Rikka, who didn't want to be tied down by anyone, and in her desire to become her lover, she removed the condom during sex and decided to cum inside her...
