As war continued on within the world, their unheard promises echoed throughout every action. A secret no one knew. A bond that lays invisible, but strong. A commitment that would never fade. Levi and Hanji made this promise before everything fell apart. This... this was their promise.

When Levi was a little boy, Princess Hanji rescued him from a terrible fate. From that day forth, Levi was in her debt. As they grew older, Levi knew he couldn't have the hand of the princess he served. He tried forgetting his feelings for her, but Princess Hanji fell in love with the only boy she truly knew. When it's time for her to be married off, well... let's say their feelings slipped through their fingertips. Levi will forever serve his princess- no matter.

Forgotten everything but his first name, Levi is hit by a wave from his past. Now he has a choice to make: either go back to his past or continue living a life he started with amnesia.