The story itself is pretty good, but the protagonist is one of the most infuriating ever.
He's constantly talking trash about all the people around him (including his friends) behind their backs, but no matter what situation he finds himself in as a result, he's completely oblivious to the fact that he himself is the problem rather than everyone else.
At one point, he acts like a real piece of sh*t towards a girl that likes him and has been nothing but kind towards him, but rather than feeling bad for hurting her and apologizing like a normal human being, he twists it around and just feels sorry for himself and makes it sound like the whole world's out to get him.

If you want a protagonist to be at least halfway decent, avoid this manhwa at all costs.

While stories of the harem style abound, for the first time I see an exception to the rule. If you are tired of seeing generic stories where the main character women fall at his feet, and fall in love with him in the most stupid way, you are going to enjoy this story. Although the development of characters is not the best, in the end the author's teachings are well reflected.