Starting from Level 1: I’ll Defeat All Reincarnated Monsters in My Secret Dungeon 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.nl fastest updating comic site. The Summary is

Shinobu Iijima, who lost his life along with his sister in a sudden disaster, finds himself reincarnated into the world of *La Vita Online*, a game he used to play as a hobby. And what’s more, he’s at Level 1… Learning that his sister has also been reincarnated into this world, Shinobu begins a grueling leveling journey to gain the strength needed to compete with max-level players.