you and Armin are classmate. You two are so close that everyone thinks you two are a romantic couple. You don't want your friendship to look like that. But, Armin wants your friendship to look like that too. And Armin actually really likes you. He's obsessed with you, he doesn't want you to get close to other men.

One day, you were given a group assignment. And you and Armin were paired up.

"Oh~.. It seems I've been paired with you.~"