Rui

Keeping her job as a hostess a secret, Rui is actually a teacher at an all boy's school by day; she's loved in both work places for her kind and reliable disposition. She has a very voluptuous figure and her hostess uniform was custom made to emphasize this fact. Although she may seem like the type to flaunt her adult charm, Rui is actually very girly, prone to daydreaming, and is a big fan of anything romantic.

Spoiler

Her real name is Mejiro Midori (目白 みどり).