11 parts Complete Oscar Storm was the shared pawn of Rias Gremory & Sona Sitri. However, he was treated awfully by his fellow peerage members.
They overwork him, disregarding his hard work, giving his credit to the two other pawns and even taunting him because of said pawns revealing his feelings for them out of jealously.
Through with their treatment, Oscar filed in a peerage transfer with Sirzechs & Serafall. With heavy hearts, they agree to the transfer.
Eventually, his transfer came through as he transfers to the peerage of Riser Phenex, the arranged husband of Rias Gremory & Sona Sitri.
However, he actually turns out to be a cool guy and a great guy. Hell, he's actually respectable to women and prefers women with great personalities instead of just bodily appearances.
Time passes as Oscar becomes loved and respected in Riser's peerage, even developing crushes on the girls in said peerage. However, things wouldn't last forever.
The day came where Riser has to challenge Rias & Sona in a Rating Game to win their hands in marriage. How will things turn out for Oscar with his 'reunion' against his old peerages.