Amelie is the child of an a\*used concubine. She is forced by her family to marry into the family of the crown prince Kyle, who is rumored to be both ugly and cruel. When Kyle appears, he hides his true face with a robe and rejects Amelie with cold words. Though initially afraid and confused, she is gradually drawn in through the glimpses of his awkward kindness. Kyle, on the other hand, is also drawn to Amelie's straightforward manner. Amelie's words thaw Kyle's frozen heart, and he even begins to feel possessive of her...? This is a story of an unfortunate daughter who has been mistreated and a lonely crown prince with a secret.... (Source: MangaPlaza)

Having grown up completely alone in the world, Riho was adopted into the Hanabishi family and endured harsh days of being mistreated by everyone around her. Then, on her 17th birthday, Riho's adoptive father tells her she must become a "sacrifice" to a yokai. But the Emperor of the yokai appears before the despairing Riho, and it seems he intends to welcome her not as a "sacrifice," but as a "bride"—!? (Source: AlphaPolis, translated)

https://www.cmoa.jp/title/315912/

To save Alexis, her favorite character from a past life, from falling into darkness, Isabella decided to enter into a contract marriage with the young Alexis, who had lost his family. During their married life, Isabella poured all her love into Alexis, who had been mistreated by his family as an illegitimate child. Then, three years later, as stipulated in their contract, to divorce upon Alexis's coming of age. Isabella left Alexis, carrying a secret with her. A wife who vanished with a secret, and a husband who lost his memories of his beloved wife. The two, who should have chosen separate paths, unexpectedly reunite eight years later. And now, Alexis has become an emperor said to be cold and merciless...!? A bittersweet adult love story where they long for each other yet constantly miss their chance. (Source: SHERPA STUDIO, translated)

Riho, who grew up all alone, was adopted by the Hanabishi family and spent harsh days being oppressed by everyone around her. And on her 17th birthday, Riho is told by her adoptive father to become Ayakashi's "sacrifice". However, the ayakashi emperor who appeared in front of Riho, who was in despair, seemed to have intended to welcome her as a "bride" instead of a "sacrifice" -!? Source: MU