Ari no Su Dungeon e Youkoso! 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

When I woke up, all I had were an unfamiliar room, a crystal, and no memories—just “me.” Awakened as a Dungeon Master, Dan starts with a few points and uses them to summon ant monsters to expand his dungeon. Alongside the ever-increasing and evolving ants, he repels intruding enemies, occasionally recruits allies, builds an impregnable mega-dungeon, and aims to find new happiness and everyday life within the dungeon!