Synopsis: My Girlfriend Was Already Fully Trained

"I shouldn't have checked my girlfriend's phone that day." I heard a strange rumor about my girlfriend, Hayoung, from a friend. "I saw Hayoung go out of a motel... with another man". I turned a blind eye to what they said, thinking they must've been mistaken with what they saw. However, a part of me was suspicious of her. And for the first time, I checked my girlfriend's phone... "What are you doing? Strip. Take off your bra and panties."