A trainer in an underground battling circuit is deemed the perfect target for genetic Pokemon experimentation, and undergoes a detailed transition in mind and body toward his favorite species, with a sexual drive to match

This is part one of a three part story about a pair of fiancés, Larissa and Eric, on the eve of their wedding. Larissa is not particularly excited about her upcoming wedding, but puts on a pleasant face for her bachelorette party. Once she returns home she finds that while Eric isn't home, she also isn't alone. An ominous figure lurks in the dark with an offer to help Larissa get out of her approaching nuptials, but not without her undergoing some changes first.