The Earl's Bad Wife

The Earl's Bad Wife summary:

The marriage arrangement introduced to the duke’s daughter, Hermina, had been to the rumoured worst playboy in high society, the Earl’s son, Erich. Hermina, who accepted the offer, sends him a letter with conditions for their married life. The letter had nothing but unreasonable demands, but Erich says that he’s happy and that he’s looking forward to their married life&h.e.l.lip;!? 「I’ll become Hermina-sama’s dog or manservant for the rest of my life」 — what is this guy saying!? Isn’t this just fluff between a beautiful intense wife and a con-man husband? A newly-wed love comedy.