Mahoutsukai Mana to Eichi no Tobira Mana the Witch and the Door of H

Synopsis

A slightly naughty fantasy comedy that begins from the bottom floor of a dungeon! Adventurers return from the dungeon. In the hands of the wizard Mana, who is changing clothes, is the "dangerous swimsuit" found in the dungeon. "What would happen if I wore such a naughty swimsuit?" It was a gateway to a sweet world. (Source: Kadokawa, translated)