One day, Akane suddenly finds herself thrown into a death game within her class, barely surviving thanks to the help of her beautiful transfer student partner, Ha. "I will protect you no matter what," Ha says, putting herself in harm's way to shield Akane. As Akane gradually becomes attracted to Ha, she unexpectedly forms a cooperative relationship with Karen, the object of everyone's admiration in class. One night, she wakes up to see Ha and Karen sharing a kiss. Heartbroken, what will Akane do!? A life-and-death battle among high school girls, who will survive…!?