Writing quality is p good, there are mistakes but they are small and you can just ignore em. stability is great, for now atleast. Although story development is good, I wished MC being quirkless, alas, he got whitebeard's tremor power. Character development is great, MC is playing his part as heavenly demon. About the world background, MC is in musutafu city and met momo, don't know anything else. Changed to 5 stars as author asked me to (previously rated 4 stars cause I wanted MC to be quirkless).
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LIKEThe thing is, quirkless would be good as author added martial arts and Chi, which would be something akin to a quirk but not at the same time.
GawkGawk:quirkless stories are annoying cause they can't explain any powers they get later on in the story. And for the most part they usually get some superpower or power up.