[Hiiro no Kenkyuushitsu (Hitoi)] Ochiba Nikki -Nae Gasshuku Hen 1-

A timid girl is escorted to a concealed equipment storage room, where a commanding man orders her to clean his body with her mouth. She complies under threat, her breath caught as his grip tightens and his demands grow harsher. The tension escalates as she fights to resist, her body trembling with a mix of fear and forced arousal.