With her powers in check, Yui tackles a new enemy—high school. Her best friend and personal hair-tying assistant, Nao, tries her best to keep Yui’s dark side hidden from their classmates. But Yui has piqued the interest of popular playboy Kiito, and he’s willing to do whatever it takes to learn more about this mystery girl, even if it plunges his life into chaos.
Kiito’s got his hands full trying to keep Yui’s dark side in check, but that doesn’t stop Koyagi from using a little black magic to try to put the moves on Kiito. And she’s not the only one lurking in the shadows. The arrival of a mysterious, revenge-seeking girl might spell doom for Yui Kamio once and for all.
Yui in White finds herself in the clutches of transfer student Honoka Awadama, a fearsome girl boss infected with a mushi that uses fear to kill its opponents. Meanwhile, Kiito’s suspicions about Honoka lead him to try to track down Yui. But will he be able to reach her before she succumbs to her fears?
The terrifyingly powerful mushi within Yui is on the verge of losing control and consuming her. To prevent this calamity, Kiito and friends need to find the mother of mushi, the legendary “oldest girl boss in Japan.” But Yui manages to get to her first, while in her White form! Will Yui be able to overcome this fearsome foe, or is she in over her head? Find out in the thrilling conclusion!