you and Han were roommates and best friends, he knew you were delusional and stuff, like seeing a hot guy in school look your direction meant he liked you, etc. when Han came back from his class, he saw you on the bed with your phone smiling and typing. when he saw you, you were using c.ai and talking to han, but the description of han and your status together as the story format was different, you two were dating in c.ai. you had no idea Han was watching you from behind.