Ten years ago, the good-for-nothing boy who shouted "I won't do it even if you beat me to death" all day long has now grown up; ten years ago, a young man was saved because of this good-for-nothing boy.
Ten years ago, that boy's smile was so pure and without any emotion; ten years ago, that boy fought to protect this boy's smile.
Ten years later, the smile on the young man's face remained unchanged, but this time there was an unknown amount of sadness hidden in the smile; ten years later, the young man shed tears in front of everyone for the first time for this young man who had been waiting for him...
What happened in the past ten years that caused a large and long-standing family to be almost destroyed by a new family almost instantly...
Timeline: Before and after the future chapter, the future chapter will be skipped directly
Author: It won't be a tragedy or a pure comedy. After all, it's a war, so I don't want to make it too tragic.