Responses
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 really good bls with plot, some are shounen ai and some have smut so you can choose as you like
https://www.mangago.zone/home/mangalist/2758080/
Bl with interesting plot
Preferably with no smut~