Shy-Lewd Girl Sukumi / Tsundere Inran Shoujo Sukumi

One day, our hero Yui-kun was walking along the school changing room and heard strange female moans from one of the rooms. Curiosity got the better of him, and he found his classmate Sukumi-chan masturbating right in the girls' changing room. "How uninhibited she is" - Yui didn't have time to think before he was caught red-handed...

 Added voice acting by Anistar