Chitose has a life outside his mothers. He has a younger sister Minazuki, who goes to his school with him and an older sister, Hazuki, who has a ravenous appetite and she's a pop diva. When Minazuki tells Hazuki how much fun it would be if Chitose could live with them. Hazuki takes this the wrong way and so begins a series of interesting competitions for Chitose. Hazuki vs. All 5 Moms, Prize: Chitose.