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]

On his way home from school, Tatsumi sees a man collapsed near a lake. When he approaches him, Tatsumi notices something strange: the person in need of help is actually a beautiful merman named Wakasa! Because Wakasa's home has become too polluted to live in, Tatsumi graciously offers his bathtub as a refuge. With a boisterous merman as his new roommate, Tatsumi's normal life won't be returning anytime soon, not to mention Wakasa's aquatic friends—Takasu, Mikuni, and Maki—often show up uninvited, making them all quite a handful for the high school student. As he humors their curiosity for human life, Tatsumi sometimes finds himself enjoying their childish antics, but he will have to keep his cool if he intends to keep up with his daily life and newfound friendship. [Written by MAL Rewrite]

Second half of No Guns Life.