Ai ni Shadow wo Nuri Kasane

Taro and Izumi have been in a relationship since high school, but now that Taro is in college, they are in a long-distance relationship. Their bond seems strong, but a traumatic event changes everything. Izumi is raped at a welcome party for her new job, and this experience awakens a dark fetish in Taro: cuckolding.

Taro wants to see Izumi with another man, and they decide to act on his fantasy. The man they choose is Kuroda, the same person who raped Izumi six months earlier. As Kuroda and Izumi have sex, Taro watches, feeling both arousal and humiliation. Izumi becomes lost in pleasure, while Taro is reduced to a mere observer.