Recommend

Yass :

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 stories that are plot focused you can check it out :
https://www.mangago.zone/home/mangalist/2758080/