Fire Emblem - Petra's Pet (Patreon)

Petra finds Bernadetta snooping on Byleth after a battle. Bernie is just far too cute for the Princess from Brigid to not have some fun with her. Of course, one thing leads to another and Petra decides to help Bernie out and give her some lessons in confidence. Of course, this takes on a very peculiar 'Brigidian' fashion, but Bernie finds that so long as it helps her to make Byleth fall in love with her, she's willing to do anything.