Zhong Quan Gong Lüe

Kang Ha-Ru is a poor college student who works many part-time jobs to support his younger sister and pay off family debt. One day, while making a delivery, he's given a card that says "Puppy Wanted." Misunderstanding, Ha-Ru finds a dog and brings it up to the hotel room Min Do-Woon is staying in, but he is shocked to see Do-Woon having sex with someone. Ha-Ru runs away, but Do-Woon happens to become a visiting professor at his university. Do-Woon hires Ha-Ru as his secretary and the line between work and professional begins to blur. However, Do-Woon's abusive ex Jang Hyuk makes it hard for him to love again.

(Source: Lezhin US)

Note: Includes 2 extra chapters.