Long chapter bl manga

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

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

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

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

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

Bi No Kyoujin Series
1 Bi no Isu
https://www.mangago.zone/read-manga/bi_no_isu/

2 Kobi No Kyoujin
https://www.mangago.zone/read-manga/kobi_no_kyoujin/

3 Bi No Kyoujin: Smoke
https://www.mangago.zone/read-manga/bi_no_kyoujin_smoke/

Kuroneko Kareshi Series
1) Kuroneko Kareshi no Asobikata
https://www.mangago.zone/read-manga/kuroneko_kareshi_no_asobikata/

2) Kuroneko Kareshi no Amaekata
https://www.mangago.zone/read-manga/kuroneko_kareshi_no_amaekata/

3) Kuroneko Kareshi no Nakasekata
https://www.mangago.zone/read-manga/kuroneko_kareshi_no_nakasekata/

4) Kuroneko Kareshi no Aishikata
https://www.mangago.zone/read-manga/kuroneko_kareshi_no_itoshikata/
4.1) Fukigen Kareshi no Nadamekata
https://www.mangago.zone/read-manga/fukigen_kareshi_no_nadamekata/

5) Kuroneko Kareshi no Afurekata
https://www.mangago.zone/read-manga/kuroneko_kareshi_no_afurekata/

6) Kuroneko to Kareshi to Ouji
https://www.mangago.zone/read-manga/kuroneko_to_kareshi_to_ouji/

Also:
Nekoka Danshi no Shitsukekata
https://www.mangago.zone/read-manga/nekoka_danshi_no_shitsukekata/

Nekoka Kareshi no Ayashikata
https://www.mangago.zone/read-manga/nekoka_kareshi_no_ayashikata/