"Oh trust me, I already know just which one he would be. I bet my scarf and half my hair it's the one with office staples on his face."
He nudged Lukas a slight bit, looking at him with a giant smirk on his face. TvT
"Yeeeep-he's always been a sucker for anyone with piercings-"
H: "SHUT UP!"
His cheeks were actually going a bit pink-
"Oooooooooooo~Keigo's got a crusshhhh-"
H: "You are such a little brat-"
Yeah so if you're wondering they very much have a sibling relationship and yes there IS a reason why they know each other.