Inma Ia no Wana Asobi (V25.08.11) (RJ01410139)

Our protagonist is an adventurer who has heard rumors of an untouched dungeon.
He sets foot into the forest where the dungeon is said to lie.
However, it seems that people who are weak and have lost some of their memories are often found in the forest…
Before he knows it, he finds himself trapped in the dungeon, where a succubus girl named Ea is waiting for him.
She has set traps within the dungeon, and if he falls into them, she will drain his semen and magical power.
If he can reach the exit before she drains him of everything, he will be allowed to return home, but…