Jealousy

Heartless was improving but so was Tu Dahei!

Furthermore, Tu Dahei's improvement was more apparent than his. It went from crooked slashes from the beginning to the point of mastering the essentials of using sword techniques with his left hand. In just half an hour, Tu Dahei's usage of sword techniques with his left hand looked as skilled as a lefty!

Without a doubt, Tu Dahei was a genius, a mind-boggling genius. He had spent only half an hour conquering the unfamiliarity of using his left hand. Furthermore, he gained an understanding of how to use sword techniques with his left hand.

Heartless was extremely taken aback and similarly, he was rendered very speechless. In this 'duel', he had played the role of a pathetic training partner. Furthermore, it was the kind that kept being defeated. No, this plot must have been written backwards!