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It is said that it is possible to have a normal human and same-sex pregnancy in this world. There are two types of beasts with special ecology. Akira, a veterinary specialist, meets Sogo, a veterinary genus who has lived arrogantly with his instinct.

In this world exist "normal" human beings and those with ears called "beasts". Beasts have a unique body that experiences heats/ruts and pregnancy between the same s** is possible. Akira, a veterinary specialist, meets Sougo, a beast who has lived an