Oji-sama Koushaku wa Koisuru Otoshigoro
おじさま侯爵は恋するお年頃
Lyra, the sole daughter of a noble, hopes to create a loving family with a good husband. Jace, a marquis who has lost interest in romance, agrees to a politically arranged marriage. Initially, he desires only a marriage in name. As he spends time with Lyra, he starts to feel emotions he thought were lost.