Following this for research purposes (because I'm not a pervert :p)
Its been a long time… so I’m a little forget but…
This is with snake God… https://www.mangago.me/read-manga/hebi_no_yomeiri/
If ur interested only
Literally Dog… https://www.mangago.me/read-manga/how_to_spoil_your_dog_gintama_dj/
Human that have dog , and dog rape
https://www.mangago.me/read-manga/chigireru_kubiwa/
I forget for this one… but if I’m not mistaken its in his human form… https://www.mangago.me/read-manga/soitogete_ryuujin_san/
As for other u can check this tag
https://www.mangago.me/tag/Beastality%20/?page=1
Here fellow perv https://www.mangago.me/home/mangalist/410662/
If you’d like https://www.mangago.me/home/mangalist/477494/
Of course, my not-a-pervert comrade (▰˘◡˘▰)
Ooh I've read hebi no yomeiri and soitogete ryuujin san but i haven't read the others so thank youuu ლ(´ڡ`ლ)
Ahhh hanare gatai kemono isn't fully translated（/TДT)/ it looks promising too
I've read remnant and pendulum, one of my fav muahahha
Thanks fellow perv, I'll check it out ε=ε=(ノ≧∇≦)ノ
(▰˘◡˘▰)
Npnp
By beast I meant like actual beast, like Otoshi Ai. Or demon or monsters. As long as they don't take human shape when they do it (yeah I'm a pervert, and so are you)