Story of My FianceeBoku no Kon'yakusha no Hanashi; 僕の婚約者の話; Story of My Fiancee

Noa, born as a second son to the lord of the manor, didn't feel like continuing to live after an incident occurred. Then one day, a beautiful assassin appears in front of him. She chased after Noa and said: "Marry me." It looks like this famous assassin fell in love with him.