Hakuto Kunai

Akira Oono, a.k.a. Hakuto Kunai (九内 伯斗, Kunai Hakuto), is the male protagonist of the series Maou-sama, Retry!. He was the creator of the game Infinity Game after 15 years the game was waxed, but he was dragged into another world trapped in the body of the Last Boss Hakuto Kunai.

(Source: Demon Lord, Retry! Wiki)