Kōsei Arima was a child prodigy on the piano until one competition where he froze entirely. Now, he can’t bring himself to play the piano. He’s still drawn to music and often transcribes sheet music of popular songs for karaoke or other things. His friend makes him tag along on a pseudo-double date and it turns out, the girl they’re introduced to plays the violin! Kōsei is tricked into going back to the very hall he froze in to watch her in a violin competition. She plays the assigned piece brilliantly, but not at all like she’s supposed to. When she puts together that he’s the Amazing Arima, she begs him to become her accompanist, but Kōhei is extremely scared and resistant.

Ascendance of a Bookworm: I'll Do Anything to become a Librarian! Part 1: If there aren't any books, I'll just have to make some!, illustrated by Suzuka

Our heroine is a college student who loves books, but who is unfortunately smashed to death by her beloved books. As her dying wish, she hopes to be reincarnated into a place where she can read books all the time. Instead, she’s reincarnated as a tiny, sickly, five year old girl named Myne, in a world where books are extremely expensive and super rare. She tries to find supplies to make books, but the supplies are also extremely expensive. So, Myne decides to try to make what she needs to put together a book. She asks her older sister to get reed plants to try and make papyrus, but she doesn't totally remember how to make papyrus. If only she could remember that one book she read that one time!

This volume is full of holiday celebrations in the House of the Immortal Dragon. Tatsu decides to wash everything, including the futon, on a day with wonderful weather, but Masa is there to disrupt the plans and challenges Tatsu to a day of having fun and ignoring chores. Then, Tatsu gets mixed up in a rap battle with another ex-mob boss. A local store hosts a costume competition, and the winner gets a Hots Springs vacation, so Miku makes Tatsu participate with her.  Tatsu later gets involved in a Tart-off, a challenge to see who can make the best fruit tart. Miku's parents come for dinner, and Tatsu realized where Miku gets her awful knife skills from: her father. Dad decimates several ingredients while Tatsu helplessly tries to save the food and not offend Dad. Tatsu gets sick and wills his little yakuza cells to fight off the virus while Miku makes a terrible concoction she swears will make him better. Miku, Masa, and Tatsu celebrate New Years, and Miku gets supremely drunk. For Valentine's Day, Tatsu and several other ex-mobsters attend a cooking class to make a beautiful cake.

There are some pretty big spoilers ahead, so be warned!

At the end of volume one, Shinji's parents go away on a vacation that Migi hypothesizes would be safe. A disturbing phone call from Shinji's father has him on edge, just in time for his mother to come home, who has been posessed by a parasite! She stabs him through the heart and leaves him for dead, but Migi uses his abilities to send bits of himself to Shinji's heart for repair. This disperses little bits of Migi all over Shinji's body, which gives him some extraordinary abilities, but may be infecting his basic humanity and ability to empathize with others! Shinji goes to the remote village of his parent's vacation, where is dad is hospitalized, and vows to protect his father from the parasite coming back to finish the job. While on guard duty, Shinji meets another like him, where the parasite didn't make it all the way to the brain. The man and parasite share custody of the mouth and nose, and they all decide to team up against parasites who are hell-bent on destroying other humans.

Volume five continues the storyline we had in volume four, where Tanjiro and Inosuke are battling a family of spider demons. Father has gotten into the fight, and neither slayer can cut this demon with their katanas. Tanjiro and Inosuke get separated, and Tanjiro finds himself face to face with one of the Twelve Kizuki, the most powerful demons. Nezuko, in an effort to save Tanjiro, discovers a special power she has with her demon blood. Rui, the most powerful of the spider demons, becomes jealous of the familial bond between Tanjiro and Nezuko, and it angers him even more. Tanjiro’s katana breaks, while both of Inosuke’s katanas break battling Father. Giyu, the slayer from volume one, makes a triumphant comeback and saves Tanjiro from certain death. We also meet a new slayer, Shinobu, whose breathing methods take inspiration from insects, and who uses poisons to take down powerful demons.

Nanako and Mao continue to battle some evil deeds that are coming out of a local shrine. The priestess is able to predict the deaths of villagers, with amazing accuracy. However, there is some Tom-foolery at play, and the curses are not what they seem. Mao is able to release the demonic spirit that has been harnessed to carry out the curses, and the spirit rebounds upon the caster. On her way to jail, the priestess predicts the end of the world: fireballs engulfing the town while a huge earthquake rips open the streets. Nanako goes back to her time to research what this event could be, and finds it coincides with a terrible earthquake that does much of what the priestess said. She goes back to Mao’s time to try and prevent or at least save some of the townsfolk, but like everything in Mao’s time, the historical record of what happens isn’t as accurate as the truth, especially when more evil spirits — and possibly Byouki — are involved.

Humans are destroying the planet and putting a strain on natural resources. Perhaps in answer to that, strange, parasitic alien lifeforms begin a slow invasion to infect Earth lifeforms and bring down the population. Some infect human hosts, others infect animals the hosts. One attacks high schooler Izumi, but he manages to keep it inside his arm rather than let it worm its way into his brain. The parasite completely devours and replaces Izumi‘s right arm and becomes sentient. It feeds off of Izumi’s systems and protects him out of self-preservation. The parasite, who Izumi starts calling “Migi”, which means “right”, can sense others of his kind, and they are mostly not in favor of allowing Izumi and Migi to continue their symbiotic relationship.

A mysterious, powerful warrior named Guts hunts down different demons and Apostles, powerful demons who have large segments of human population under their thrall. Guts inadvertently saves Puck, a tiny fairy, and gains a companion he doesn’t want. Puck tags along with Guts, at first because of a life-debt, and after that because he thinks he’ll see some amazing stuff in Guts’ company. Guts goes up against a powerful reptilian demon who is threatening a whole town and feasting off of its villagers. We find out later that Guts is also looking for more members of Godhand, a group that can be identified by the same brand he has on his neck.

Another Outsider has broken into the house and threatens to curse Shiva. Teacher takes an ax to it and chops off its head, but that doesn’t kill it. The stranger mutters some things about Shiva’s soul, and its “mother,” and it intrigues Teacher. The now-headless one teases Teacher, saying he knows how to lift the curse, and he brings Teacher to “Mother,” who is under the water in a deep lake. Teacher only learns of more disturbing news rather than a cure for Shiva, so the two head home in defeat. Strangely though, Shiva doesn’t show any of the classic signs of one who is cursed. Inside, a Father sets into motion the plan to bring back the girl from the other side for some unknown purpose.

In a pet store in Japan, many of the young, adorable kittens are quickly adopted, leaving behind the lovable, fluffy, slightly older cat, whose sad eyes beg for a new owner to come adopt him. Kanda, a recent widower, adopts the big guy and provides a loving home for him. Kanda names him Fukumaru, a combination of the words for "luck" and "happiness" in Japanese. Fukumaru is so grateful that he has been adopted that he tries to go into every room with Kanda, which is normally fine until Fukumaru tries to go in the shower with him. He realizes the hard way that there are some places they cannot be together.