"It sucks more and more on your fingers... It's becoming a 'woman' face." A body that is convulsed by a sticky caress ── I thought you were a beautiful older sister... but the truth is a naughty beast with plenty of male sex ──!? Toko (26), a sober woman who has decided to work behind the scenes at a company. Her reason is because she loves to see how makeup makes people beautiful. One day, she meets Aoi, a beauty staff member in charge of a demonstration event for new cosmetics, and is fascinated by her skill and beauty. Aoi from the front stage and Touko from behind the scenes... Just when I thought they were just admiring each other... A certain incident led to them suddenly getting closer to Aoi!? ─ ─ When I bounced away, the feeling of the wig entangled in my arm! At the same time, Touko finds out that Aoi is a "man"──!? Her sensitive tokoro was groped all over with her fingers... Even my wet pussy was soaked... With Aoi-san's hands... How will I change...?