What secrets are hidden inside his pants? The protagonist Mitsuki is reincarnated into another world. There she ends up as a slave, but is then purchased by a beastman and begins her new life as a maid. Mitsuki is of the age that she is highly curious about her "nighttime duties." One day, she overhears one of her maid friends speaking about a certain topic of interest. "I never dreamt that a penis could do that.
Not even in my wildest dreams." It would seem that the genitalia of beastmen are different from that of humans? On the other hand, Mitsuki's beastman master Berthold sees her talking cheerfully with a human man and while he maintains a calm and gentle outer composure, he is seething mad with jealousy.

There is a TL and R18 version.

Official Translations:
English (DLsite, Coolmic), S.Chinese, T.Chinese, Korean, Thai