Expressionless Kashiwada-san and Emotional Oota-kun

Kashiwada-san is a girl who doesn't show emotions on her face no matter what happens. Oota-kun is a boy who shows emotions on his face too much. They are classmates in a junior high school, and Oota-kun is always trying to surprise Kashiwada-san with his actions. But he never succeeds. They look like opposite characters, but it seems like they like each other!