A Japanese GV-OAV 740 bulky guy receives a text from his stepfather that his mother has given birth, so the stepfather has to stay for a while at his place (not sure why). The stepfather is rather young and enjoys being nude at home, arousing his stepson as days go by. One night, the stepson fantasises about his nude stepfather and starts to jerk off. His stepfather wakes up and upon seeing his stepson wanking, decides to do more than that (this could be the enactment of the fantasy). The stepson wakes up one morning and finds his stepfather gone. Then he receives a text from his stepfather… to be continued…