The story is centered around 23-year-old Aoki Daisuke, who has just landed his first teaching job as a grade school instructor at Futatsubashi Elementary School. He is placed in charge of Class 3-1, where one of his students, a mischievously precocious nine-year-old girl by the name of Kokonoe Rin, develops a crush on him and proclaims herself as Aoki’s girlfriend. At first he dismisses it as harmless, but she aggressively pursues her efforts to be with him. Aoki is in shock when she makes sexual advances towards him, thus leading him to believe that Rin comes from a troubled family. Aoki finds out that Rin’s mother had died and she is living with a cousin whose flashbacks lead to violent outbursts.
There is 1 queer character listed for this show; none are dead.