My Second Life as an Idol is a Manga/Manhwa/Manhua in english language, Manhwa series, english chapters have been translated and you can read them here. You are reading chapters on www.mgeko.nl fastest updating comic site. The Summary is

From failed idol to hailed idol! Flop idol Yongmin dies an unfortunate death but is given a second chance at life in the body of Ian, a super hot rich kid with a voice to match. At his side, he finds Jin, a mysterious soul tasked with guiding Ian to becoming a certified star. But is it really all smooth sailing from here?