In a prosperous city, there are many races- which are beyond the understanding of humans- hidden in society. The strength and the prosperity of these races not only depends on their own growth, but also on human belief and worship of them. However, as more people in modern society believe less in them, the more their numbers and strength diminish. Although there are still some powerful and ancient beings, they can only try their best to hide in corners of the world or pretend to be human. On the other hand, there are other races with dark purposes who call themselves the "Devil Hunter Association". In order not to be discovered by the demon hunters and not targeted by humans, various races worked hard to integrate into human society.

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.*

Original Manhua: [AC.QQ](https://ac.qq.com/Comic/comicInfo/id/650835), [KuaiKan Manhua](https://www.kuaikanmanhua.com/web/topic/11544/), [ManmanAPP](https://www.manmanapp.com/comic-1405275.html)