Hakushaku-ke no Akusai

The marriage arrangement introduced to the duke's daughter, Hermina, had been to the rumored 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 has nothing but unreasonable demands, but Erich says that he's happy and that he's looking forward to their married life...?!

"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 newlywed love comedy.

(Source: Shousetsuka ni Narou, translated)