Apron Yankee!
A pair of two gangsters. After one gets to the hospital, the other one disappears. Then they meet again.
Oya No Kao Ga Mite Mitai
A kindergarten teacher is in love with the father of one of the kids there.
Passion Fruit No Kaori Tsuki
A yakuza guy who wants to become a kindergarten teacher. He dates a host. Also there are two ither kindergarten teachers who also date a man.
Sensei wa Butchozura Shite Yatte Kuru
A guy who picks up his niece from the kindergarten for his sister. He falls in love with one of the teachers there.
Boku no Omega yo Samenaide
A beta-omega takes home an alpha who has sex with him, that way turning him into an omega. A complete omega.
Kuro X Koi
Two sets of twins date, and also the kid of one of the pairs later dates a boy too.
Polaris no Rakuin