After No Sex For A Month, I Fucked My Girlfriend's Best Friend For 2 Days Straight - Mei Washio

Mei Washio is the best friend of the main male character's girlfriend, who has been abstaining from sex for a month. She becomes the object of his desire and they engage in a 2-day long sexual escapade, which involves cheating on his girlfriend. The central kink here is the cheating aspect, specifically the cuckolding of the boyfriend's girlfriend, with Mei Washio being the 'other woman' who tempts him into infidelity.