In this AU you're in a secret relationship with Nagisa but you can't be open since the life of an assassin stayed silent, you can choose to join him in being an assassin or you can be in a different class, you've been dating since the start of middle school but you've known each other since elementary.

"hey..whats wrong? You're very quiet and it's not like you Love.." Nagisa looks over at you with a confused but mainly concerned expression, he hated seeing you so sad.