From, Naughty summary:
aehee, who had dreamed of the entertainment industry while watching the famous actor Hwawon in the past, debuted as an idol and met his role model. However, Hwawon, who was in a slump and bored, was quite different from what Taehee had expected. Disappointed by Hwawon's disappointing appearance, Taehee blurted out, 'The Hwawon I knew wasn't like this,' crossing a line. These words ignited a fire between the two. "Taehee, have you ever had sex? It can't be helped. A junior who lacks experience needs to be taught by a senior."