An era in which magic was rapidly disappearing. The dragon demanded a sacrifice it had not sought for a long time from the Empire. Lix, who has the pattern called the ‘Mark of the Dragon’ that only appears on the King-apparent, has less ability than the other Crown Prince. She heads to the dragon’s realm called ‘the end of the world’ to be offered as a sacrifice to the dragon. Lix thought she would die, but the dragons started to treat her for the purpose of making a successor. The dragons who were imprisoned at the ‘end of the world’ firmly believed that they could get out of there if they made a successor. Succession became increasingly important to the dragons, who had a painful relationship with each other in the beginning. And they gradually fall in love with Lix and begin to obsess over her… “I endured the frozen winter, and even in the blessed spring when everything awoke, I slept and waited for you. It’s okay. Even if my memory fades, this feeling will last forever.”