The Once, Insignificant Key (2 in 1)

.

"It's nice to meet you, my hero successor" Tsuna smiled warmly at the boy who just finished sheathing the katana that had come out of nowhere.

Tsuna initially wanted to test Kazuya since he wasn't completely convinced that he really was the one who sent the letter given to him by Kou. Kazuya had proven himself three out of two times by his standards.

The first was his actual battle prowess. As a hero of Edea, even if one was sent back to the earth after being stripped of the blessing of the summoning like he experienced, the amount of growth that the hero received would still have been retained.

Though the boy wasn't as strong as he initially expected, both his knowledge and use of his mana was more than enough to prove that he had learned everything he knew from the sages of Edea.