Ryota is a healthy male college student who grew up in a very common and happy family. - His father, who tends to go on business trips, always goes on a long-term business trip by calling out to Ryota, The man in this house will be only you, I asked everyone. - Yes, except for Ryota, all of them are women with his mother Yuri, grandmother Rieko, sister Michiru and sister Rika. - Protecting extremely beautiful and glamorous women as a man of the family with crime prevention and hard work ... There is also a serious role ... Actually, this family, incest is becoming commonplace, and if you have free time regardless of day and night, H It has an unusual side to do something! - There is no time to dry the big black pillar, which has only one with mom in the morning, grandma in the day, and sister and sister at night! - Popular three-generation incest drama part 4 that is fun with H!