Synopsis: One day, keita's father says to him, "I think you'll need your mother, Keita." His mother passed away when he was a kid. He was sad at first, but he somehow managed to accept it. But why now...? Anyway, his father brings four ladies in front of he and says, "The girl who goes with you the best will become your mother. You live with them for a while and score them." He doesn't need any mother anymore, so he just give them low scores. Like this, he starts living together with four hot and horny  ladies....