CMYep

Mic and Neo https://www.mangago.zone/read-manga/mic_and_neo/
Sakura Gari https://www.mangago.zone/read-manga/sakura_gari/

Idk about any1 else but i swear i only know tragedy bls from around those years like the economy crash hit japan that bad u can see it in the bls

Arashi no Ato https://www.mangago.zone/read-manga/arashi_no_ato/

These are my favs out of the very few I've read :
https://www.mangago.zone/read-manga/royal_fiance/

https://www.mangago.zone/read-manga/innocent_bird/

https://www.mangago.zone/read-manga/silver_diamond/

https://www.mangago.zone/read-manga/crimson_spell/

https://www.mangago.zone/read-manga/you_re_my_loveprize_in_viewfinder/

These are some of my FAV older BL manga! They are products of their time for sure but
Madness by Shimotsuki Kairi https://www.mangago.zone/read-manga/madness/
Vassalord by Chrono Nanae https://www.mangago.zone/read-manga/vassalord/
Little Butterfly by Takanaga Hinako https://www.mangago.zone/read-manga/little_butterfly/
Komatta Toki ni wa Hoshi ni Kike by Abe Miyuki https://www.mangago.zone/read-manga/komatta_toki_ni_wa_hoshi_ni_kike/
Ramune no Shalala by Tagura Tohru https://www.mangago.zone/read-manga/ramune_no_shalala/
No. 6 by Asano Atsuko https://www.mangago.zone/read-manga/no_6/

https://www.mangago.zone/home/mangalist/1672691/

https://www.mangago.zone/read-manga/kimi_to_uchuu_wo_aruku_tame_ni/
https://www.mangago.zone/read-manga/the_music_is_beautiful_pain/
Not sure if these fit, but they're pretty good.

Oh, I saw a couple of manga that I've read and really enjoyed, I'll check the other ones too :)) thank you

The first one looks pretty cool! ٩(๑❛ᴗ❛๑)۶ And I'm not too keen on music related manga because they bring back bad memories haha, but I'll give the second one a go, too, since it's only two chapters. Thank you!

Np! Sorry about the second one, I wouldn't recommend reading the second chapter if you don't like music based plots. I REALLY recommend the first one though.

https://www.mangago.zone/read-manga/madoka_no_himitsu/
https://www.mangago.zone/read-manga/rental_onii_chan/
https://www.mangago.zone/read-manga/shounen_note/
https://www.mangago.zone/read-manga/minami_nanami_wishes_to_shine/
https://www.mangago.zone/read-manga/ashita_watashi_wa_dareka_no_kanojo/
https://www.mangago.zone/read-manga/sakamichi_no_apollon/
https://www.mangago.zone/read-manga/oyasumi_punpun/

I'll check them out but I'm scared since you included Oyasumi Punpun haha. Thanks! (●'◡'●)ﾉ

Nah don't be scared. Nothing is scary here (｡•ᴗ-)✧