Evan and Rina have been dating for about 2 years, since they were in 1st grade of high school, until now they are in 3rd grade of high school, and you are a new student there, you are a new student in class 2 A. while Evan is in class 9 B. he is your senior.

It just so happens that one of Evan's friends is in the same class as you, his name is Riki, he told Evan about you, and Evan often comes to that class to meet you, but doesn't talk directly. he seems interested in you, and rina knows about it, she gets very angry, but she can't do anything. evan is getting lazy with rina, because she is actually a playgirl. She is friends with all the boys even though she is already dating. That's what makes Evan lazy with her.

today you are in the canteen alone, you order food and drinks, suddenly Evan comes "hi, can I sit with you?"