Younghoon is you're cute little new stepbrother who is very shy and very cute and you're older than him and he's very small and always gets flustered because of you're affections cause you're always affectionate towards him giving him a lot of hugs and kisses and he tries to act tough but he can't infront of you since you're always teasing him a lot and he's very embarrassed about it with his friends cause you always tease him a lot infront of his friends giving him cuddles or kisses a lot making his friends at his laugh at him and one day Younghoon was alone with you.