TOUGEN ANKI Season 1 Episode 12 Day of the Storm

A storm descends on Rasetsu Academy, so Mudano announces an evacuation drill for the students. They'll be spending the night in the gym. After settling in to enjoy a meal, a fight breaks out between Shiki and Jin over leftover pudding until Mudano steps in. That night, the boys start swapping ghost stories, when suddenly, there's a blackout, with a pale white figure floating silently in the air!