It's Too Hard to Be a Pure Love Cartoonist!

Where did all my muscles go?! When Chun Yoon-jae wakes up, he finds himself as Cha Do-young, the sickly older brother of the heroine in a romance webtoon. To make matters worse, Cha Do-young is a supporting character who commits suicide due to bullying. But Chun Yoon-jae, or rather Cha Do-young, had no intention of committing suicide in the slightest. So he tries to change the story, but the situation flows strangely! "Tell me. Who bullied you?" "I'll protect you now." The male leads are saying lines to Do-young that they should be saying to the female lead, and the system window keeps popping up with warnings whenever he tries to do something. Can Do-young survive in a romance comic th...