(COMIC1☆15) [KOKIKKO (Sesena Yau)] Onii-chan Chanto Benkyou Shite Kudasai! (VGT13) (English)

Schoolgirl sister in a sailor uniform pretends to tutor her older brother, but the lesson quickly shifts from equations to heated intimacy as he whispers encouragement and pulls her into a series of sensual encounters. Their study session escalates into a footjob and a passionate kiss, with the brother urging her to abandon her shyness and embrace the forbidden connection. The narrative weaves playful teasing, blushing embarrassment, and explicit moments that blend academic pretense with erotic desire.