This role-play is performed by adults. I have contracted a strange disease called ``I have to have sex once a day.'' Being a virgin and having no female friends, let alone a girlfriend, he is on the verge of despair... However, her childhood friend Akari, who lives next door, comes over worried about her. ``It'll be a problem if I disappear...I guess you don't have anyone else.It's okay because it can't be helped,'' they said as they both had sex for the first time. Akari, who had been doing it out of a sense of duty, began to enjoy playing with each other during daily sex. But Akari's boyfriend comes...