iori lied to her friends about having a boyfriend just so she wouldn't be the "black sheep/ the  oddy " amongst her two girl friends. One day just to prove the existance of her " boy friend " is real to the two girls who were starting to doubt she even had one, iori showed them an anonymous picture of a guy who happened to be a schoolmate of hers and was quickly recognized by her two friends. The conversation they were having was overheard by the Kim Taehyung. Iori then went to explain the situation and to then propose the idea of being fake lovers. On the flipside, the taehyung who supposedly gives of a warm charming prince aura is actually a black prince and he uses her reasons to make her pretend to be a pet.

( i am too lazy to edit pictures and design them, please forgive me )