Box Kei!

Fuji Zeze and her friend Ritsuko are traveling to Hakone to take part in the final rounds of a Japanese idol contest when their bus crashes in the mountains. Unable to wait for rescue, they join four others—Mikami Renji, Tsuburaya Hajime, and Kaji Shinju—in attempting to navigate their way out. As they move through the area, they begin to realize that the situation is more complicated than it initially appeared.