After a harsh rejection, Momo Ayase finds herself sulking when she notices a boy being bullied. Acting on impulse, she steps in to help. Grateful for her kindness, the alien-obsessed boy tries to chat with her about extraterrestrial interests he believes they share. Ayase dismisses his claims, stating that she actually believes in ghosts. This sparks a debate over which is real.
To settle it, they make a bet. Ayase will visit a spot linked to aliens, while the boy will explore one tied to the supernatural. At their destinations, they both discover the shocking truth: aliens and ghosts exist.
This realization marks the beginning of their adventure. Together, they face surreal encounters with the supernatural and extraterrestrial, hoping to restore normalcy to their lives.