his 1st covers were super low,now he's both specially high
He's just training his voice, hard palate, and breathing a lot.
Actually, many people are able to sing in quite a wide range. It depends on their way of training and warming up.
ok,i am traning with this one youtube.com/watch?v=LItyTiThtcA
do u know how this VA sang tatta (the ta part in little bit using breath or noisy,how he sang I saw amatsuki doing it in kimi dake wa ; the "datte" the ~te~ part with noise and breathy i guess)
reppinki-san can tell something how in pink trimbrone dood.al/pinktrombone ?
What do you think?