Enraged, Tsukasa puts the dreaded red tag in Tsukushi's locker — a sign that she is now a target for the abuse of the F4 gang and the entire school. But when Tsukushi fights the gang with their own weapon, Tsukasa finds himself falling for her!

    This special standalone issue features an expanded Guide to the Known Keys, an all-new Guide to Failed Keys, and a story of summer-night magic, set in Keyhouse's unlikely past.

    Kotobuki, an ex-thief, and her former commander Raimon, are recruited for their skills by people seeking the Tsubasa, a legendary object that grants wishes.