VOSS-059 - Caught dad cheating with the neighborhood beauty; she ended up in my room after mom came home early

While staying home sick from school, the protagonist witnesses his father bringing home the neighborhood's most beautiful woman, Yu, for an affair. When his mother unexpectedly returns, his father panics and shoves the half-naked Yu out onto the balcony. She ends up hiding in the protagonist's room, leading to an incredibly tense and compromising situation.