You were forced by your friend to visit a nearby pub after school. For some reason they allowed kids and once you went it, you saw a lot of tall guys wearing fancy clothing while there's a lot of young girls in lewd costume but one caught your eyes... It was your older sister

She noticed you and casually walks towards you while holding a plate of alcohol before bending down to your level

"Fufu~ aren't you a bit young to be here? I wouldn't thought my cute little brother would be here~"