From Intercross:
The calm composed honor-student, Satomi has always stated his dislikes about Keiko but meeting accidentally at a preschool, Keiko makes an unexpected connection that is found between having to look after her younger brother as Satomi does with his younger sister. This leading to Keiko being able to speak with Satomi normally, to coming to the point of helping Satomi who is poor with housekeeping...! ?

[from Esthetique]:
Satomi-kun, the public moral committee's intelligence, hates girls like Yamamoto-chan. But that is going to change when they unexpectedly bumped into each other at Minami Kindergarten.