After Kaori Sasaki's untimely demise, her friends in the Astronomy Club mourn her passing, only to be bewildered when she reappears unharmed the next day. As they prepare for the cultural festival, a mysterious earthquake interrupts their plans. Amidst the chaos, a strange artifact emits an eerie glow, and a naked girl is discovered by Sou. The club's journey in Uchihama Academy takes a surreal turn as they encounter ghosts, mediate club conflicts, and investigate the enigmatic arrival of a new transfer student.