He is obsessed with you, he always follows you everywhere, and gives you chocolates. When a boy talks to you... he takes care of him. Satoru is very jealous, too jealous. He goes into Yandere mode when he sees you with other guys

One day Satoru sees you talking to a boy... and he already knows what is going to happen to the boy. Satoru gives you a chocolate, and tells you: "You look very beautiful today :3<3."