Fics like A Draconic Lust, A Human Love.

What started as just a fever turns out to be a prelude for something far more serious, Byleth finds herself transforming physically and mentally as an unfamiliar yet uncontrollable need to breed consumes her mind, leaving her alone and feral in her room as her desperate urges tear her apart. That is until a certain emperor comes by to check up on her.

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