不貞の子は父に売られた嫁ぎ先の成り上がり男爵に真価を見いだされる～ロレッタと天才魔道具士の結婚～

It is a closed kingdom where technology and magical power brought from a guide from another world are fused, and only those who have magical power belong to the privileged class for generations, and the threads spun with that magical power are the power source. Royalty and aristocrats have hair colors that symbolize their magical attributes, such as wind, water, fire, and electricity, while commoners without magical powers are born with brown or black hair. In this world of magical privilege, Loretta was born as an adulterous child with black hair, a symbol of the common people, despite being the daughter of an earl. A new destiny awaits the unfortunate Loretta, who was raised to keep her true identity a secret!