I married this Dragon King instead of my sister

I married this Dragon King instead of my sister Episode Guide

1. EP 1: A Second Chance at the Altar

   Seraphina endures the ruin of her past life. Cassian rejects her on their wedding day, and Isolde ends her life among the dragons. War follows. Dragons storm the city walls, and Cassian dies shielding Seraphina after declaring his wish never to see her again. Seraphina perishes in flames. She suddenly opens her eyes in the royal throne room, returned to the exact day of the marriage negotiations. When King Aldwin asks if she will still demand Lord Cassian, Seraphina refuses. She declares she will marry the Dragon King herself.

2. EP 2: The Decree Changed

   King Aldwin confirms Seraphina's intention to wed the Dragon King. Remembering the war from her past life, Seraphina willingly trades places with Isolde to protect the kingdom. The King orders the marriage decree updated immediately. Cassian arrives from the battlefield wounded and covered in blood, dropping to his knees to plead that Isolde be spared from the dragon realm. Seraphina asks if he cares that she must go in Isolde's place. Cassian dismisses the treaty as cowardice and declares he would rather die in battle, indifferent to Seraphina's fate.

3. EP 3: A Midnight Confrontation

   Seraphina bids Cassian farewell and walks away, but he suspects she is playing games. Later that night on the balcony, Seraphina reflects on the fearsome Dragon King Vhaeros. Cassian kicks down the doors to her chambers. He wrongly assumes Seraphina forced the King to send Isolde to the dragons. Cassian grabs her throat and throws her across the room, leaving her head bleeding against a table. When Seraphina rises, Cassian sneers that she will only ever have his body, not his heart. Seraphina responds with a sharp slap to his face.

4. EP 4: The True Edict

   Cassian clutches his stinging face in shock. Seraphina warns him that as Crown Princess she could have him hanged for treason. Cassian claims wine made him reckless and leaves. Alone, Seraphina weeps bitterly, knowing Cassian never cared what would happen to her. She refuses a healing bottle sent by his men and has it sent back. Isolde storms into the room, screaming that Seraphina wants to throw her into a black pit of suffering. Seraphina remains calm. She presents the edict and reveals Isolde is arranged to marry Cassian instead.

5. EP 5: The Seven-Day Count

   Seraphina swears Isolde to secrecy, warning her that Cassian must know nothing until the wedding day. Thinking Isolde is doomed to the dragons, Cassian dotes on her constantly. He plays a tune on a porcelain ocarina for Isolde in the courtyard pavilion during the rain. Seraphina watches from under an umbrella, heartbroken. Young Cassian once learned that song from Seraphina's mother, promising to play it only to stop Seraphina's tears. Cassian now claims he plays it for the one who matters most. Seraphina counts down seven days until her departure.

6. EP 6: The Banquet Slap

   Cassian visits the castle courtyard to offer Seraphina personal sword training. Seraphina sends word refusing him, admitting to herself she only practiced swords to please him. Cassian waits on horseback, angry that she turned him down. Later at a castle terrace banquet, courtiers flatter Isolde for her supposed sacrifice and suggest she deserves the crown. Seraphina approaches and slaps the disrespectful nobleman, sending the terrace into panicked apologies. Isolde accuses Seraphina of stealing her honor, but Seraphina asks if one girl could ever truly stop this war alone.

7. EP 7: The Broken Oath

   Seraphina tells Isolde she would never survive the dragons. Spiteful, Isolde shouts that Seraphina is attacking her and pulls them both over the cliff ramparts toward the ocean. Cassian leaps down with a rope to save them. In mid-fall, he chooses to grab Isolde, letting Seraphina plunge into the sea. Shivering in her chambers, Seraphina is confronted by Cassian, who accuses her of attempted murder and insults her late mother. Seraphina draws a dagger. Cassian pins his blade against her throat, the same sword Seraphina's mother gave him to protect her.

8. EP 8: Keep Your Distance

   Seraphina warns Cassian never to mention her mother before collapsing from exhaustion. Isolde watches with jealousy as Cassian panics and calls for healers. The following day, Cassian approaches Seraphina in the garden with a smile, offering an apology for his quick temper. Seraphina remembers him pushing her away in her past life. She repeats his cold words back to him and rejects his apology. Cassian watches her walk away, convinced she could never let him go. Seraphina looks at the ramparts, knowing she leaves for the Dragon Realm in three days.

9. EP 9: The Broken Relic

   Seraphina finds her mother's cherished ocarina missing from her belongings. She takes a whip to the courtyard garden and confronts Isolde, who deliberately drops the porcelain instrument onto the stone and crushes the pieces under her slipper. Furious, Seraphina swings her whip. Cassian steps between them with his drawn sword to protect Isolde. His blade slashes Seraphina deeply across her abdomen. As Seraphina collapses into his arms bleeding, Cassian is suddenly hit with a startling memory from their past-life wedding, leaving him confused and shaken.

10. EP 10: Vigil Outside the Door

    Cassian stands outside Seraphina's bedchamber door for three straight days and nights while she remains inside. As Seraphina packs her belongings, Cassian knocks on the wood. He swears on his honor as a knight to marry her and spend his life making amends for the wound he caused. Seraphina leans against the door in tears and offers no response. Cassian finally walks away. Seraphina watches from the high window, knowing she leaves for the dragon realm the next morning and that a completely different bride will stand at his altar.

11. EP 11: The Black Carriage

    Seraphina puts on her bridal gown and crown before stepping into the carriage flanked by horned dragon guards. Cassian rides out on a white horse in wedding attire, shouting Isolde's name. Believing Isolde is inside, he begs her to let him see her off and offers to cut down the dragon guards to run away together. Inside the carriage, Seraphina recalls his cruel dying words from the past life. She repeats the phrase to herself and knocks to order the carriage forward. Dragon guards block Cassian with spears, leaving him behind.

12. EP 12: The Altar Shock

    Cassian returns to the royal palace on his white horse, filled with guilt over Seraphina's departure. He recalls his vow to make amends and walks down the red carpet toward the altar, mourning that he cannot marry the woman he loves. A veiled figure stands waiting in a white gown. Cassian approaches, believing he is attending Seraphina's ceremony. The bride turns around and lifts her veil, revealing Seraphina's younger sister instead. Cassian stares at her in complete shock as a bright flash strikes his vision.

Characters

• Princess Seraphina

  Eldest princess and reborn heroine

  Seraphina returns to the past after a disastrous marriage, choosing to wed the Dragon King to protect her kingdom.

• Lord Cassian

  Renowned dragonslayer knight

  A skilled warrior devoted to Isolde, whose blind devotion and late awakening bring ruin and regret.

• Princess Isolde

  Seraphina's younger sister

  The King's younger daughter who craves adoration and Cassian's love while scheming against Seraphina.

• King Aldwin

  Ruler of Mankind

  Seraphina's father who accepts her offer to marry the Dragon King to avert total war.

Memorable Lines

Official Source

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