Borderline

Mok-yeon receives a proposal for a threesome from his friend and sex partner, Sun-hwa. The other person is Nan-jo, a man that Sun-hwa has been wooing, and while he's great to have around because he's rich and kind, the problem is that he is boring to have sex with. At first, Mok-yeon was just a little curious about Nan-jo, but throughout the threesome, he couldn't take his eyes off Nan-jo. Mokyeon makes a seductive offer to Nan-jo, who wants to save Sun-hwa from him.

“I'd like to have a taste of your body, Nan-jo. Would you be willing to spread your legs for me?”