Rikka, a childhood friend from the same hometown who moved to Tokyo at the same time, and I ended up making a friends-with-benefits arrangement where we only have sex for sexual release, with no romantic feelings involved and no kissing. At first, I was satisfied with getting free sex, but I became jealous when Rikka got along with other men... I gradually became captivated by Rikka, who doesn't want to be tied down by anyone, and in my desire to become her lover, I took off the condom during sex and went for the absolute no-no, ejaculating inside her...