Monster Girl Encyclopedia Stories: Diary Of The Age of Monster Love II

Canonity
Kenkou Cross is known to wholeheartedly encourage MGE fan writing. These books appear to be fanfic stories by another author (named ストレンジ, 'Strange'), in this case) which Kenkou has possibly elevated to some level of canon by providing endorsement, artwork, and publication under the Monster Girl Encyclopedia name.

Image Gallery
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