In the year 1939, humanity was on the verge of destruction. Equipped with weapons of devastating power, a mysterious alien race, known as the Neuroi, began an invasion of the Earth, ravaging the planet, obliterating countries, and vanquishing human armies. To counter this seemingly unstoppable force, the world's powers united. A new device was produced, called the Striker Unit, capable of facing Neuroi technology. Girls equipped with the Striker Unit became known as the Witches, forming humanity's last line of defense. They began their fight against the Neuroi, utilizing their now-enhanced magical abilities, flaunting destructive weapons no human could manage. Fast forward to 1944—Yoshika Miyafuji is a young teenage girl who eventually decides to join the 501st Joint Fighter Wing, known as the "Strike Witches." With no formal training however, can Miyafuji learn to cooperate with her fellow Strike Witches? And if so, can she save humanity from the Neuroi onslaught? [Written by MAL Rewrite]

The story is set in the year 311 of the Orbital Calendar, when humanity has migrated to countless colony clusters in space. A space colony girl named Akiha Shishidou encounters a malevolent artificial intelligence named Leopard that has been installed on a colony. Akiha is joined by an Inter-Colony Police officer named Itsuki Kannagi, a taciturn young girl named Honoka Kawai, and a robot named Imoko "Imo-chan" Shishidou.

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 the mysteries surrounding Korai House, its residents, and a villainous organization attempting to end the world. Will Yuuta be able to save everyone, or will the ever-present threat of panties result in their doom? [Written by MAL Rewrite]

The Osake wa Fuufu ni Natte kara talk event at the Machi★Asobi vol. 20 event announced that the short series will receive a 14th episode. (Source: MAL News)