Title: Mayo Mayo!
Other title: まよマヨ!
Author: Yuu Eichi
Des: Spin-off of Mayo Chiki! with Hinata Mayoi as the main character.
While using the girl's washroom Mayoi accidentally discovers that the popular and handsome butler Konoe Subaru is in fact a girl. Now that she knows about Subaru's secret, she must work together with Subaru and her sadistic mistress, Suzutsuki Kanade, to protect Subaru's secret from being discovered.
Vol.1 Chapter 2: Mayoi becomes a maid!: uploaded.net | rapidgator.net
Vol.1 Chapter 1: A stray sheep!: uploaded.net | rapidgator.net