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Angry Chihuahua asked a question

The manga im looking for is like those transported to a fantasy world types. I dont remember much but the mc is a boy and he is seen as a black entity. He himself sees him like a normal person but other see him as a black entity. I think there was an elf (?) tribe that asked him for help as well. Im not sure tho.

Pls help me find this ive been searching for ages now. ╥﹏╥