Best friends Tokieda Airi and Sahara Taki have had a happy junior high school life, but the mysterious group “F“ begins to target them because they attract too much attention! “F“ has already hurt many attention-grabbing students, and they begin their attacks on Airi and Taki by trying to split the best friends apart. When this method doesn’t work, they sink even lower: they target Airi’s sister Nako! Airi and Taki’s beautiful school life has been ruined, and now they must race to reveal the culprits of “F“...