The F-Class Healer Omega is a Villain [BL]

The definition of a villain according to Kim Sangmin: The person who has to die for the story to end.

But his story had just begun when the villain of the book he was reading died in the end, and he woke up to start the story again.

As he uncovers the hidden, untold truths behind the cascade of a villain, the more he leans towards becoming a true villain—only in pretend, of course! He has a little brother to take care of, he can't just die and leave him alone. He's also his baby brother's role model, so he has to teach him how to live a long life by becoming a hero instead!

And how does he plan to become a hero?

Obviously, by stalking the actual main character of the book and overtaking his spotlight at every chance. Step by step, he would overthrow the 'real' hero of the book and change his status to one with praise.

Easy, right?