One day, Tama, a lazy man, receives a message from his friend Renafalt, whom he had met on the Internet for five years, but never seen in person. The message asked him, “Senpai, would you like to hire a home security guard?" Tama, who was convinced that “Renafalt is 200% a man,” found a person with a red suitcase at the arranged meeting place. However, the person turns out to be a beautiful girl with big breasts. "Ah...um...are you my senpai?" The start of a strange cohabitation story between an apathetic man who wants to live quietly in his corner of the world, and a JK with a comical disorder! (Source: Comic Ride, translated)

One day, Hajime Tamachi, a typical bottom-feeding loser, receives a phone call “Senpai, will you hire me as a housemaid?” The person who called was "Rena", a friend he had known for 5 years through online games, but he doesn't know her real name or appearance. "Actually, I'm a cute high school girl with big breasts!" Hajime was tempted by those words and went to meet her, and what awaited him was the real thing just as she promised!