Now this is a challenge... Here i go!

Upside:
Watanuki Hibiki & Behoimi & Suzuhara Mirai & Nanjou Misao
Don't know the name of the girl fron Homeroom Next Door

Left:
Sena Yukie & Asahina Eriko & Oomori Minori & Ichijou & Ichijou's Little Sister & Kanbara Hitoshi & Satou Chika & Kitajima Yuka & Jijii & Momose Kurumi & Tenchou & Taeko & Tachibana Rei & Kashiwagi Yuuna & Miyata Akira

Ceter:
Inugami Tsurugi & Akiyama Otome & Shiratori Suzune & Momose Shuu & Media & Ichijou Nozomi & Katagiri Himeko & Rebecca Miyamoto & Inugami Miyabi & Saotome & Igarashi Miyuki & Uehara Miyako & Tendo Mikiko & Suzuki Sayaka
Not 100% sure, but i think the onebehind becky is Shiroyama Karin

Right:
Zuura & Kashiwagi Yuuna & Tsubasa & Makapon & Serizawa Akane & Kurusu Yuzuko & Takamizawa Haruka & Nikaido Hikaru & Fujimiya Madoka & Takase Kazuya & Shinohara Masato & Asou Maria & Asou Mahiro & Ootaki Tetsuya & Yankee

Sorry, i don´t know the girl at the far right

Animals:
Oosanshou (i guess i am miss-spelling it) at the lower left
Black Cat is near Hibiki, he is a puppet from the Inteligence Club leader
Mermaid Princess is the snake falling in a mug
Salamander is being hugged bi Misao
Multiples Q-chan's are flying behind Misao
Mesousa is near Becky
Neko-kami-sama is with Yankee
Dont know the name of Hikaru nor the animal with an ahoge over Himeko, when i get those i will post them