[Crimson (Carmine)] Ane no Kareshi ni Moteasobareta Watashi Natsu Gasshuku Hen

Fujijura Hinata, her school's strict public morals committee head and basketball captain, arrives at a seaside summer camp only to attract the lewd stares of her sister's boyfriend and his tanned friend. Her mortification in a skimpy bikini spirals into a secluded beach encounter where the pair grope and suckle her voluptuous body, teasing her protests as her teammates search the shore dangerously close by. By sundown the prim captain admits she came countless times for any man who entered her — a sweat-slicked mind-break descent from discipline to desperate surrender.