I'm the Fifth Son of a Count, but I Married Into a Ducal House and Became a Duke

ja-Latn
Hakushaku-ke no Gonan desu ga, Mukoiri Shite Koushaku ni Narimashita. Zensei Chishiki de Ryouchi wo Fukkou Shite Yome ya Kashin to Shiawase ni Narimasu