Jigeumeun Sugangjeongjeong Gigani Animnida

If you just exaggerate, you can win all the professors' affection, right?

Not content with ruining Jung U-Yeon's perfect A+ record, Professor Kim Jae-Shin even gave him an F. U-Yeon, who was looking for a way to get back at Jae-Shin, accidentally runs into a drunk Jae-Shin and impulsively sleeps with him. Despite his title as a divorced man, Jae-Shin accepts men more readily than expected, making U-Yeon suspicious of his true nature...

“Look me straight in the eye. Who do you think just shoved their dick down your throat, Professor?”

(Source: MrBlue, translated)