Dungeon Master wa Shinkenshoubu ga Shikai no ni!

An explorer who challenges dungeons for world peace. A dungeon master who interferes with it wherever he goes. The two fought over and over again, and time passed. The explorer's adventure continues as usual, and his back is completely stretched out and he has become a young man. And the dungeon master who blocks him has also grown beyond recognition. Her rich breasts made their presence felt defenseless through the gaps in her clothes.

(Source: ASCII Media Works, translated)