My name is Lee Ga-Ram
After that day, things between the trio living under one roof progressed smoothly.
They had sex but not every night since Hae-won's body was a bit delicate and his body needed to adjust before the next time.
Each time they had sex, Hae-won's personality became completely different from what he usually was. He was very active and wasn't easily satisfied. His sexual desire was wider than he thought.
Other than that, Hae-won worked as Woo-Bin's assistant comfortably. Though Woo-Bin would kiss him a few times, it'd only end there because he didn't want to make things uncomfortable for him.
Plus, he was trying hard not to show any sign of his special relationship with Hae-won to avoid him getting harassed by sasaeng fans. He wanted to avoid that at all costs.
The threat from Song-Cha at that time seemed to hold no water as she didn't try to get back at Hae-won in any way. In fact, they never came across each other after that.