Kamui Gakupo x Reader

This is a story about Gakupo X Reader (duh! In the title!). You were a co-worker at a music store with Gakupo. Not to mention Kaito, who worked there as well and was a friend of yours and Gakupo's. But, one day, Gakupo has invited you over to his house! You were slightly confused in whether you should go or...