In order to give him an excellent offspring, Mia, a female Earthling, was held captive by the highly-intelligent alien Frederick...

The protagonist, who has accidentally acquired a bizarre manhood, is sobbing because even prostit**es are running away from him.... more>>

But one day, he receives an order from his father, the king. The order is: “Conquer Avalon’s dungeon!”.

In that dungeon, created by an ancient mage, may lie the hidden treasure that will restore his manhood! With this thought in mind, the protagonist spends his days attacking dungeons and his nights training princess maidens. Will he be able to restore his manhood to its original state? <<less

An otaku with a hobby of masturbating was reincarnated as the son of a great mage.
As soon as he was born in this life, he vowed with a goal of embracing women till his death.... more>>

That said, when he became 20 years old, the Demon Lord which was sealed by his ancestors revived, and now it is his role to seal it once again.

And that demon lord is sealed in a tower dungeon that is rumored to be impossible to capture.

However, by an unexpected coincidence, he had found out that the Demon Lord is also one of him, a kindred spirit from within,
so he joined her instead and filled several traps in the tower dungeon, and thus they enjoyed a s*x spree with all the women coming over! <<less