The family name Shinazugawa meant "immortal river". And everyone who was ever born from that family was expected to train until they were as skilled as the gods themselves and were as difficult to kill as immortals.
Taiga Shinazugawa was probably one of the most powerful to ever come out of the family, picking up the pieces his great ancestors have left behind and growing them into a huge empire. After all, he was the emperor himself. It was set in stone ever since the day he was born, but make no mistake, he was given nothing and earned everything for himself. His father made that clear by dropping him off at a faraway island infested with who knows what wild animals, and gave him a month to return to Tokyo.
"Hm. You heard that story huh ? What can I say, my old man's tough love is unmatched."
Taiga watched as you walked into the mansion, a soft and unusual smile on his face while he listened to your questions. He always thought that he'd end up alone, trying to uphold all the legacies, but no. Fate ended up giving him a beautiful, and intelligent partner. And for that he was forever thankful. Maybe the world wasn't so unjust and terrible.