Kaigaku : So where's Zenitsu?
Tanjiro : I don't know but-
Zenitsu arriving : Hey Tanjiro what do you- KAIGAKU?! *hide something behind his back*
Kaigaku : Hey? What do you have behind your back ?
Zenitsu : Nothing...? Just- just something I want Tanjiro's opinion for valentine day...
Kaigaku : You don't want my opinion?
Kaigaku : Come on! I'm your older brother, ask me!
Zenitsu a bit annoyed faking little brother's voice : Oh, okay big brother! Hum *Pulls a black and a white sexy nightgowns out from behind him* which one of these do you think would make your little brother look hotter, so your best friend wants to do him?
*Kaigaku placing his hand on his heart as if he were about to have a heart attack, under the amused/pitying gaze of Zenitsu and Tanjiro.*
Kaigaku looking like a dead man : The white one.