Yusei Yoshida was originally a nameless person with no family. After being picked up by Teacher Songyang and brought home, he slowly picked up everything a human being should have.
It stands to reason that for such a great kindness, he should devote everything he has to repaying it. But among several disciples, he seemed to be the only one who was unfazed by the death of Teacher Songyang.
Because he is the one who has to carry forward the things that everyone in the school has left behind.
From the very beginning, he gave up fighting the foreigners, giving up learning swordsmanship, and holding on to the pen. In the years to come, he will be the person who lives the longest so that Teacher Songyang's name will never be forgotten.
Then, the youngest boy began his journey in the universe, letting his mentor's true name be sung in the text.
So, the original promise was met.
Intention: Since there are people holding swords and embarking on the journey, there must also be people standing behind and looking up, singing the stories and people who should not be forgotten.
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