Series If you can't get married by [date], I'll marry you

"If you're not married by the time you're 30, I'll marry you." I still cherish that promise I made with my childhood friend when we were little. But when I reunited with my childhood friend, she was already married and a housewife with children. "I've been waiting for you all this time," she said with a sad smile, and we had that one time together that we couldn't have back then.