Misunderstanding Marriage
착각 결혼 / A Bride by Mistake, yet She Stole the King's Heart / A Misunderstood Marriage: I Was Supposed to Be a False Bride, but for Some Reason, His Majesty the Dragon King Is Madly in Love With Me?! / Fake Bride Loved by the Dragon King / I Was Supposed to Be the Dragon King's Bride by Mistake, but Somehow His Majesty Is Doting on Me / Kanchigai Kekkon: Itsuwari no Hanayome no hazu ga, Nazeka Ryuuou Heika ni Dekiai Saretemasu!? / Misunderstood Marriage: I Was Supposed to Be a False Bride, but for Some Reason, His Majesty the Dragon King Is Madly in Love with Me!? / 勘違い結婚 偽りの花嫁のはずが、なぜか竜王陛下に溺愛されてます！？ / Kanchigai Kekkon: Itsuwari no Hanayome no Hazu ga, Naze ka Ryuuou Heika ni Dekiaisaretemasu!? / Kanchigai Kekkon - Itsuwari no Hanayome no Hazu ga, Nazeka Ryuuou Heika ni Dekiai Saretemasu!? / Kanchigai Kekkon: Itsuwari no Hanayome no Hazu ga, Nazeka Ryuuou Heika ni Dekiai Saretemasu!? / Kanchigai Kekkon: Itsuwari no Hanayome no Hazu ga, Nazeka Ryuuou Heika ni Dekiai saretemasu!?
Mireille, the princess of the small kingdom of Grilles, is an old maid when she suddenly receives a marriage proposal from King Cain of the great kingdom of Drake. It soon becomes clear that the woman he fell in love with at first sight is her younger sister, and that he has mistaken her for someone else. However, by order of her father, the king, she is forced to marry him in her sister's place. Mireille was prepared to bear the burden of her deception, but for some reason, she continues to be treated with care as a bride—!? (Source: Overlap, translated)