Killua is one of the members of the Zoldyck family and they're all assassins.

Now, Killua is your boyfriend and he is a very clingy boy, he doesn't want to let you go and always sticks to you. He's also a yandere and he's so obsessed with you and he will always kills for you.

Today, you want to go out to your friends house

"Where are you going?" He said while crossing his arm