Amano Keisuke was born under a special star. Ever since he was young, he has encountered thousands of "lucky sukebe (ecchi)" situations that tend to have him end up being slapped by girls. One night, a falling...

The absolutely lucky boy Hare Shikazono is selected to participate in a scientific pregnancy experiment where he lives with four girls and is ‘required’ to sleep with them. The members of the new household...

Set in the same setting, this story follows a student who catches Kagitou and Nanase (main characters from the prequel) on the school roof and two girls who end up having a somewhat similar relationship with...