Hero From A Past Life 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

“Had he been a hero in his past life or something…?” “That’s right. I once rescued this nation from destruction.” When Ja-in is kidnapped due to his family’s massive debt, Unjo happens to walk by and save him from his kidnappers. From that day onwards, Ja-in’s life is never the same…