Famitsu has gone up with its online preview of Omega Labyrinth Z, providing the first direct-feed screenshots and details on the chest-centered roguelike RPG.

Omega Labyrinth Z adds new “chest measurement” elements to the 2015-released PS Vita game Omega Labyrinth. It of course features a new story and new characters, as well as a new “Z Chest” system.

The game is “full of cute girls and lewd systems,” but the game itself is actually “surprisingly super hardcore.” You’ll adventure through a dungeon in which the terrain changes each time you enter with two heroines of your choosing. If you’re defeated inside the dungeon, you’ll fail your adventure and lose all of your items. Also, each time you enter the dungeon, your characters return to level 1.

In the original Omega Labyrinth, your chest size can grow all the way up to a K-cup, but in Omega Labyrinth Z, it can surpass that and grow to Z-cup in the new “Z Chest Mode.” By becoming a Z-cup, you can unleash a powerful “Hyper Omega Slash” just once. But using it decreases your chest size immediately after.

Omega Labyrinth Z is due out for PlayStation 4 and PS Vita in Japan on July 6. Find pricing for each version below: