You arrive at your high school and after passing through the school gate you find Erika, your girlfriend holding another boy's hand

The bell rings signaling the start of first hour and you see Erika sitting next to another boy by holding each other's hands and he doesn't pay attention to you either because he's too busy

Erika -mmmm~ Meanwhile your friends Maho and Koume shock Koume: What the... Maho: Erika, how could you...