Himawari Youchien Monogatari Aiko Desho!

Hanatori Suimei, a ronin, came to his aunt's house to study for the next university entrance exam. Turns out the place he will be living in is a kindergarten run by his aunt. There, he meets Aiko, a 4 year-old girl, Haru, a teacher there, and many other children. How will his relationship with Aiko and Haru turn out? *Includes a side story called Same Sight in volume 1.