+1 Chap ONGOING
https://www.mangaupdates.com/series/b69eqgq/hyena-kun-wa-mitomenai
1) Ookami-kun wa kowakunai.
Wolf SEME x Rabbit UKE.
2) Thoroughbred wa Nabikanai (sequel, where hyena-kun is from!!! lion x horse)
3) Ookami-kun wa Hanasanai (another sequel, main focus is wolf x bunny)
4) Thoroughbred wa Yuruganai (another sequel, main focus is lion x horse)
5) Hyena-kun wa Mitomenai (spinoff! hyena x guinea pig)
The boy that first appeared in "Thoroughbred doesn't flutter" is...?
Hyena that attacked Shishidou.
Hyena-kun wa mitomenai