[Fumihiko] Kuro Gal-chan to Megane-kun (COMIC HOTMILK 2017-12) [CrowKarasu]

Kageura Shuugo, the silent glasses-wearing loner his classmates whisper about, becomes an unwilling prize when Yua, a dark-skinned gyaru senpai with enormous breasts and a mouth to match, loses a bet and is ordered to take his virginity and 'get it over with quick.' Caught touching herself in the school bathroom and seized from behind, the bold gyaru flips the script instead — mounting him with stocking-clad thighs, smothering him under her huge chest, and growling that she'll pump him dry until ahegao ecstasy shreds her cocky composure. But once he finishes deep inside her, the teasing senpai is the one left flustered and begging for more rounds.