Responses
Yess!!
Read these two in this specific order, tho not a sequel they're kinda connected, also don't be put off by the art at the start, it changes for the better in just a few chapters :
Song of Reverberation
https://www.mangago.zone/read-manga/song_of_reverberation/
The Promise
https://www.mangago.zone/read-manga/the_promise/
also this list has many power bottoms:
https://www.mangago.zone/home/mangalist/2758080/
underrated and not well known bls with power bottoms