If you get possessed, shall we take it slow together? Always, no matter the time, there's that triangular "thing" stuck to Ghost-chan's head. Even when her outfit changes or when she's sleeping, it's always there, but what is that? And the pure and cute question that children inevitably face: "Is Santa really not real?" To not betray the straightforward expectations of Ghost-chan and the others, Fushihara-san and her team's grand operation begins! Furthermore, a dangerous black shadow that has never approached Fushihara-san before is looming…!? Unveiling and intertwining in Volume 10!