The Tsunashi couple is as lively and offbeat as ever. Hardcore otaku shut-in Hajime and workaholic office lady Kaoru still get themselves into hilarious situations thanks to both their own eccentric natures and the bizarre group of friends surrounding them. After learning about Kaoru's pregnancy, Hajime works harder than ever to become a good husband and a worthy father. Meanwhile, Kaoru reflects on their relationship and remembers all of the trials and tribulations that brought them closer. The two of them continue to put their best foot forward in their lives and their marriage—all for the sake of long-lasting, selfless love.

In near-future Japan, Aya Okamura lives alone in an apartment away from her parents. Her mother has worked overseas ever since her childhood, so her aging father Kouji and their cat Mii-san are the only ones left in their family home. After a tiring day, Aya declines her father's invitation for dinner by lying that she is still at work. Yet that very night, she receives another call with sudden news that may bring this separated family closer.

Huey Anthony Disward and Dalian trek to the land owned by Sergeant Callavos, where it is rumored that a Phantom Book may be located. With the help of a local herbalist named Thalia, the two reach a remote village and begin to confirm relevant information to their investigation. Although it has been reported that Callavos perished alongside his family in a gruesome fire six months prior, his daughter Florence has been sighted in a nearby forest—and is suspected of causing the blaze. To verify these allegations once and for all, Huey and Dalian travel to the lord's manor, only to uncover the truth behind a thorny past.

Kiri Haimura has an obsession with beautiful hair—specifically, cutting it. This bizarre trait is what leads him to seek out a rumored long-haired ghost who lives in an abandoned house on a hill. However, he finds not a ghost, but a beautiful girl with long flowing hair named Iwai Mushanokouji, the Hair Queen, whose hair cannot be cut due to a family curse. Iwai explains that there is a death game surrounding her, and that if she is killed by a cursed object, aptly named a Killing Good, the wielder gets their wish granted. After protecting Iwai from Authors—Killing Goods users—he learns there is in fact a Killing Good passed down in his own family: a pair of scissors used by his ancestor to commit murders. Naming the scissors The Severing Crime Edge, he finds that he is able to cut Iwai's cursed hair with them, setting her free to live a normal life. However, many Authors seek to kill the Hair Queen, and Kiri will have to protect her in this lethal game of fate.