@@Monika-qp2jn His range is just huge. He can sound like a girl naturally, it just takes some warmup. When he performed I wanna be a girl live at Tokyo Dome in 2021, he literally jumped up 2 octaves once his voice warmed up a minute in.
I think Mafumafu did a great job; his singing style is different from the original, but typical of Mafumafu himself. I was intrigued that Mafu sang in different ways and mixed them together. It turned out to be an interesting combination. Thank you for your work! Mafu, stay our idol forever. (^ω^)