The Drain Lab (ドレインラボ Dorein rabo) is a location in Monster Girl Quest. It is a laboratory hidden underneath Fairy's Island and used by the Seekers of Truth.


The Drain Lab was created thousands of years prior to the events of the story. It is used by Promestein to not only experiment on humans, but also to extract their semen, hence the name. The laboratory is so secretive that not even the residents of Fairy’s Island, including Queen Fairy and Queen Elf, are aware of its existence.

In Monster Girl Quest Paradox this area has made no appearance as of yet, nor it was mentioned in Part 1 or Part 2, despite Fairy Island existing.

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