The Demon Emperor Hopes for a Hero is a Manga/Manhwa/Manhua in english language, Action series, english chapters have been translated and you can read them here. You are reading chapters on www.mgeko.cc fastest updating comic site. The Summary is

Betrayed and faced with death by the one he trusted, the Demon Emperor meets his end. Having always longed for death, he welcomes his final moments with a sense of peace. However, 66 years later, he awakens in an unfamiliar body. To his surprise, this body is referred to as a 'hero'? The Demon Emperor never meant to exist for the sake of peace! Eventually, he embarks on a journey once again, not to seek happiness, but to embrace death...