After escaping a bus hijacking with the help of masked superhero Strange Juice, Yuuta Iridatsu finds his soul separated from his body and in the care of a perverse cat spirit, Chiranosuke. As a spirit, Yuuta wanders around his residence, the Korai House, aiming to regain his body and observe the other residents: Meika Daihatsu, a genius inventor; Mikatan Narugino, a cheerful idol; Ito Hikiotani, a shut-in NEET; and Rabura Chichibu, a spiritual medium. After catching a glimpse of Narugino's undergarments, Chiranosuke reveals to Yuuta that he becomes exponentially stronger upon seeing panties. However, if he sees another pair while he is still a spirit, his power will cause an asteroid to crash into the earth, ending the world and killing his friends. Punch Line follows Yuuta as he unravels