[Sold by Chapter]The Substitute Bride is Lovingly Broken in By the Next Marquis

I know I'm just a substitute, but I can't stop the heat in my body...

It's the Taisho era. Sayano, the daughter of a baron's mistress, ends up getting married to replace her late older sister who passed away just before her wedding. The groom is Arisue, the son of a higher-ranking marquis. They're aware of the class differences in their families, as this is a strategic marriage meant to exchange noble rank and assets. As a result, her in-laws are cold and Arisue keeps a distance from her. However, Arisue eventually falls for Sayano's courage, cute looks, and intelligence, and they slowly open up to each other. Then it's finally time for their first night together. Sayano is enveloped in sweet reverberations coming from his hot skin and intense desire. She feels bliss, but a dark shadow is beginning to creep in...