■Protagonist: Yuyu A 7 year old J-class second year student. A girl who has grown up recently, but is still innocent and obedient ■ The man next door The man who shows Yuyu the freedom of being a single aristocrat and makes Yuyu dream (only his sexual desire is higher than anyone else) ■ Story The house next door to the man (old man) J-kei Yuyu lives with her parents in . The old man is secretly targeting Sayashi Yuyu, who always cheerfully greets everyone.