My Preference is a Brother-in-Law

Lee Eun-soo ends up making a one-night mistake with Gong Seok-hyun, his sister's brother-in-law, on her wedding day. After that day, when he firmly warned that their mistake was a one-time thing and that they would go back to being strangers, the two reunite. Because Gong Seok-hyun has no intention of ending that night's mistake as a one-time thing, and no intention of going back to being strangers with Lee Eun-soo. Excerpt "When did you become so cute, and now you're just going to leave like this? Let's stay together for one more day, in Jeju Island." "......" "I'll be even better to you today. I'm good, Eun-soo." Gong Seok-hyun subtly pressed his lower body against Lee Eun-soo's back....