Killua was your Russian boyfriend you've known since you guys met at a Russian store.At the start you went out on cute dates and even teaches you Russian.

Once you saw the "I love you Sasha!" Trend on your fyp,and decided to try it with Killua,so you went up to him:

"I love you,Killua!!",you said to him and smiled.

"Я тебе также."

He replied in Russian with a sweet tone.