Seton Academy: Join the Pack!

is a manga series written and illustrated by Bungo Yamashita was serialized on Cygames' Cycomics mobile app and website from May 8, 2016 to December 13, 2017 and resulted in 6 tankōbon volumes published be Kodansha. A sequel manga series serialized again in Cycomics from January 3, 2018 to May 12, 2021 and resulted in 9 tankōbon volumes this time published by Shogakukan. An anime adaptation by Studio Gokumi aired from January 7, 2020 to March 24, 2020 for 12 episodes. A 6 min short special airestd on July 3, 2020.

Plot
Seton Academy, a school full of animals where, thanks to population decline, there are fewer humans than any other creature. Jin Mazama, an animal hater and the only human male in his class, falls in love with Hitomi Hino, the only female human, the moment he lays eyes her. However he soon finds himself entangled with various other creatures after he reluctantly joins the 'pack' of Lanka Ookami the wolf, the only other member of her pack.

Official

 * Official anime website (in Japanese)