The Great Villain Who Threatened to Kill Himself is a Manga/Manhwa/Manhua in (English/Raw) language, Action series, english chapters have been translated and you can read them here. You are reading chapters on ManhwaZ fastest updating comic site. The Summary is
At the age of 18, Nie Xiaotian, a senior high school student specializing in martial arts and physical education, suffered a left leg fracture while rescuing a girl crossing the road. From then on, he bid farewell to his sports career but gained the "Study Genius System." In order to successfully pass the college entrance examination, he entered the system's virtual space to study academic subjects. Ten years later, when he wanted to return to the real world, the system informed him that the only way to leave was to be killed by someone. Thus, he embarked on a long and arduous path in search of death.