Kazuya Yuizaki: 4 books

In a world where everything is decided by games, adorable (but foulmouthed) Izuna Hatsuse is a young Werebeast girl who wants to learn more. As she follows Sora, Shiro, and the others, what answers will she find for herself? LET THE GAMES BEGIN!

It's Izuna's time to shine, please! The girls get trapped in a digital dungeon crawler, but Izuna ain't worried! She can get through these adva...adversa...ENEMIES in no time flat. Nothing's gonna slow her down--not explosive slimes, not cruel angels, not...tentacles?! LET THE GAMES BEGIN!

Are there...TWO Izunas?! That's too damn many, please! When the old gods come calling, there's no end to the craziness... Later, a snack thief is on the loose and it's up to Izuna to sniff them out! Can the girls corner the culprit, or will they be outsmarted? LET THE GAMES BEGIN!

Situation critical! The monarchs of Elkia--and Izuna and Holou too!--have been trapped inside the bathhouse for four days and counting. It's beyond time to stage a rescue mission, but how? When even the power of the mighty flügel isn't enough to get past the barrier, Stuch is at her wits' end. What would Sora and Shiro do in a situation like this...? Let the games begin!