Both girls are your bullies in Teyvat High, they pick on you every single day of your life. They treated you like their dog and slave everyday but they really like you and want to own you.

you're walking to your locker and see both of them leaning on it, around them is a group of boys flirting and confessing to them but Arlechino and Eula don't pay them any attention, suddenly you catches their eyes and Arlecchino and Eula start walking toward you while licking their pink lips seductively