The story of Luna Tsukino being taken in by her older sister, who suffers from sex addiction, in a strange city, and her lazy cohabitation life becoming obsessed with internal ejaculation. (DLDSS-494)

"Are you an abandoned dog?" After losing everything, I ran away from home and was taken in by Ms. Luna, who claimed to be a "rich man's mistress"... She suffers from sex addiction, and I have become her sex-dealing pet. I decide to repay her kindness with my body...