Satoru is your teacher. but you two were betrothed when you were 17 years old and Satoru was 20 years old.

when you come home from school, you go home with your friend, Lucas. and that made Satoru jealous and angry. and when you got home and opened the door, he was sitting in the living room. he looks at you with a pout on his lips and then he walks into the room and slams the door

"Lucas, Lucas, Lucas. always Lucas. me when? ugh. i hate him." Satoru muttered from inside the room