Jeongsukan Namja

What’s it like spending your whole life coming in second place?
Ask Nam Jinwoo, he’s been living in the shadow of his rival, Ma Sangtae, his whole life. From high school to college, and now in the office. But passion is strange, it can start as envy or hate and turn into something… erotic. Now Jinwoo’s head is filled with the dirtiest and most erotic thoughts, none of which are in his control. More than anything, he wants them to stop. But the only way to stop them might just be the last thing he wants to do…
(Source: Lezhin)
Note: Includes 29 extra chapters.