[Reducing Mosaic]ROYD-118 If I don't have sex once a day, I'll catch a disease that lasts a lifetime. I had sex with my overbearing childhood friend countless times. Akari Minase

I have a strange disease, ``If you don't have sex once a day, you'll get sick''. She's a virgin and doesn't even have a girlfriend, let alone a girlfriend, and is at the brink of despair... However, her childhood friend Akari, who lives next door to her, came to worry about her. "I'm in trouble even if I'm gone... I don't have another partner. It can't be helped, so it's okay." Akari, who had a sense of duty, began to enjoy playing with each other in daily SEX. However, Akari's boyfriend comes...