Responses

As he was slowly adapting to his bird body, naturally....the brain would also adapt to those of a bird, no?
Humans can't fly so how did he know how to fly? Yes yes, he flapped his wings, easy peasy, but humans aren't really accustomed to flying.
He adapted to his new body, so bird body = bird brain HAHAHAHAHAH. It's as simple as that
Im so stupid for this, really
How old is he before the isekai? Because, why the hell his brain regress to a 3 yr old.