YOU SAID:

killua is hot i dunno why

INTO JAPANESE

キルアは暑いですなぜかわからない

BACK INTO ENGLISH

Kirua is hot I don't know why

INTO JAPANESE

キルアは暑い理由はわかりません

BACK INTO ENGLISH

I don't know why Kirua is so hot

INTO JAPANESE

キルアがなぜこんなに暑いのかわからない

BACK INTO ENGLISH

I don't know why Kirua is so hot