I Love Handsome Nerdy Man?! [DINDIN]

Jae-eun likes handsome and nerdy guy, but meeting someone like that is still very difficult. Since her last relationship three years ago, Jae-eun has been single and focused on her studies. However, her ex-boyfriend Hee-jun, who hasn't changed at all, and Sun-woo, the man who fits her type, suddenly appear.
Jae-eun is attracted to Sun-woo because of his impressive physique and smart nerdy charm, but for some reason, Hee-jun keeps watching her.
Eventually, Hee-jun's provocation causes her to lie to Sun-woo about being in a relationship with him, and Sun-woo gives a surprising response.
"Didn't you lie to me because you also have feelings for me?"