In her past life, human princess Seraphina loved dragonslayer Cassian with obsessive fervor, forcing him to marry her—though his heart belonged to her younger sister. War erupted, the kingdom fell, and Cassian died pleading only to "never see her again." She perished in flames, vowing: *If given another chance, I will never cling to him again. Reborn on her wedding day, she makes a new choice—yielding Cassian to her sister and offering herself in marriage to the brutal Dragon King Vhaeros, to avert the coming war. Vhaeros intended to torture her to death as a pretext for battle, but her cold defiance on the torture stairs, her negotiations at death's door, and her kneeling to tend wounded dragon soldiers slowly melted his frozen heart. Meanwhile, Cassian realizes on the wedding day that it was Seraphina who went to the dragons—and past-life memories torment him. Awakening too late to his true love, he pursues her to the dragon realm, only to meet her icy farewell.As Seraphina and Vhaeros grow close, she uncovers the truth: the mark on his chest matches the young dragon she saved twelve years ago—at the cost of her own near-fatal wound, healed only by her mother's sacrificed life. She is the very one he has mourned for twelve years, building a shrine in her memory. Misunderstandings dissolve. Old enmity transforms into twelve years of destined redemption—two souls, reborn, finally saving each other.
I married this Dragon King instead of my sister has 43 episodes (ongoing).
Lantern Alley Pictures makes vertical short dramas built on cliffhangers, revenge and second chances.
You can watch I married this Dragon King instead of my sister online on Runotoon, in the web browser on your phone or computer. There is no app to download. Start with Episode 1.
The first 10 episodes are free, and you don’t need an account to start. Each of the other episodes unlocks with 15 Coins. A new free account comes with 75 Coins, you can collect free Coins every day, and Runotoon Pass adds Coins every week. It is included in Runotoon Pass: Pass members open every episode without Coins.
I married this Dragon King instead of my sister has 43 episodes on Runotoon so far, and new episodes are still coming. Together they run about 104 minutes. The latest episode came out on October 25, 2026.
In her past life, human princess Seraphina loved dragonslayer Cassian with obsessive fervor, forcing him to marry her—though his heart belonged to her younger sister. War erupted, the kingdom fell, and Cassian died pleading only to "never see her again." She perished in flames, vowing: *If given another chance, I will never cling to him again. Reborn on her wedding day, she makes a new choice—yielding Cassian to her sister and offering herself in marriage to the brutal Dragon King Vhaeros, to avert the coming war. Vhaeros intended to torture her to death as a pretext for battle, but her cold defiance on the torture stairs, her negotiations at death's door, and her kneeling to tend wounded dragon soldiers slowly melted his frozen heart. Meanwhile, Cassian realizes on the wedding day that it was Seraphina who went to the dragons—and past-life memories torment him. Awakening too late to his true love, he pursues her to the dragon realm, only to meet her icy farewell.As Seraphina and Vhaeros grow close, she uncovers the truth: the mark on his chest matches the young dragon she saved twelve years ago—at the cost of her own near-fatal wound, healed only by her mother's sacrificed life. She is the very one he has mourned for twelve years, building a shrine in her memory. Misunderstandings dissolve. Old enmity transforms into twelve years of destined redemption—two souls, reborn, finally saving each other.
Yes. Its original language is English, and it has subtitles in German, Spanish, Filipino, French, Indonesian, Italian, Brazilian Portuguese, Thai, and Vietnamese. Some languages may not cover every episode yet.
