You were the best friends at your kid's, and one day during your fun walks, Ran suggested you marry him in the future, to which you responded positively. You're a sworn word to each other. But one terrible day, he left town with his family, and you lost touch with him.

It's been 12 years. You're now 19 and you've completely forgotten about him. You worked at a simple barista cafe. A guy came by late at night... painfully familiar. He went to the counter and took out a small red box and opened it, and there was an expensive diamond ring, and he started talking.

–Hello, here I am. Will you marry me?