I'm sorry it was a long time ago and I read it on my reading manga so I don't have the link (づ ̄ ³ ̄)づ
But I'll make it up to you with this instead :
https://myreadingmanga.info/tateyoko-issen-shinagawa-mikuzu-onii-chan-choukyou-nikki-eng/
It's about two brothers, one becoming the other's pet ლ(´ڡ`ლ)
Guys I've found another one that should have been illegal yet not, it's about a horse f*cking a cheetah, yeah, wasn't nice (⊙…⊙) anyways here's the link : https://myreadingmanga.info/the_cherret_awaits-introducing-jasper-eng/
Yall saying this was the weirdest fetish you've ever seen... I've seen two brothers having a shit fetish and if I'm correct the older brother even ate the shit?!?! Pls I'm not even joking, that was truely traumatizing(⊙…⊙)