Harem in the Labyrinth of Another World

When a regular high schooler named Michio Kaga stumbles onto a weird online game, clicks through a character creation screen, and then wakes up in an actual medieval fantasy village with no logout button, the classic isekai setup kicks in — except this one leans hard into its mature rating and doesn't pretend otherwise. Armed with an overpowered build he min-maxed during character creation, Michio starts carving through dungeons, accumulating gold, and working toward a very specific life goal: building a harem. The show is upfront about that from the jump. If you came here expecting it to be coy, it isn't. Passione produces this one, and the dungeon-crawling sequences are genuinely detailed — there's real RPG strategy baked into how Michio approaches fights and resource management, not just vague 'game world' window dressing. It scratches a similar itch to Kaifuku Jutsushi no Yarinaoshi or Shinmai Maou no Testament if you've seen either of those — adult content woven into a legitimate fantasy adventure rather than tacked on as an afterthought. The isekai bones are solid enough that the action holds up even setting aside the ecchi elements. Based on a light novel and running 12 episodes, it tells a complete enough story without dragging. If you want a grounded, RPG-flavored isekai that's honest about what it is rather than dancing around it, this delivers exactly what it advertises.