hey so, did you know that zombie apocalypse is considered fantasy? now you do, try "rainbow city" :3 (SA on chap 3, best to skip)
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 -
Turning
https://www.mangago.zone/read-manga/turning/
Fate Makes No Mistakes
https://www.mangago.zone/read-manga/fate_makes_no_mistakes/
Haunted by desire
Super interesting and hot fantasy BL ???