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 these -
https://www.mangago.zone/home/mangalist/2758080/
Actually so bored rn. So many of the good manhwa have ended (we love Taeju) and nothing is interesting anymore