There are twenty independent stories written by twenty different authors, sharing the common theme of "April". An anthology that is considered a rare item as it has never hit the shelves as a standalone book. There is no ISBN and it is an unbuyable except in online auctions. The anthology was published as a bonus gift to Dengeki Magazine readers in 2009.

In the late 1800s, Thomas Alva Edison is a famous inventor, but he is also a master of fighting fallen angels who come into the human world. This role is called an 'exorcist' in the church, but Edison, with his new weapons, calls himself an 'artisan.' Levi is the son of a noble house, but when he is orphaned by an angel, he decides to follow Edison. Now he is Edison's apprentice, and does his best to make sure no one again has to suffer as he did.

They say the countryside is understaffed. But there are dependable colleagues and wonderful hot springs! Saz, an adventurers' guild employee, was left to the frontier by Hinnar, who has connections to the minister. He returns to active duty as an adventurer on the frontier, and is busy there as both guild employee and adventurer, enjoying the hot springs and opening up new possibilities.

One day, Akira gets lost in a world where wizards and humans coexist. In this world, the moon that attacks the world is feared as a "great disaster", and Akira, as a sage, saves the world together with the wizards who fight against the moon. Akira participates in a parade in the royal capital with the wizards and is welcomed by the townspeople. However, there is also a wizard who does not appear... The story of the battle between the wizards and the sage and the moon unfolds. (Source: Natalie, translated)

An anthology comic of Shabake by various mangaka.

What if Monogatari's Ararararagi, Zaregoto's Ii and Jun "Humanity's Strongest" Aikawa, and Okitegami Kyouko no Bibouroku's titular forgetful detective all attended school together? In 2002, NisiOisiN won a Mephisto Prize prize for his debut novel Zaregoto, Book 1: The Kubikiri Cycle. Part of the 15th anniversary celebration will be 4-panel crossover gag manga Seishun Kijin-den! 240 Gakuen (240 is a pronunciation pun - 240 can be read as "Nishio," so "Youth Oddball Story! Nisio Academy"). (Source: Crunchyroll)

A manga anthology based on the DMM Games/Nitroplus browser game Touken Ranbu -ONLINE- by the editorial department of shounen magazine GFantasy.

The story revolves around a young girl named Uiba Shikatani and her newly found pet dinosaur, which is named after the only words that come out of its mouth, Muka Muka. (Wikipedia)

In the prestigious magic academy Nemurispica, known for producing many outstanding talents, one of the newly selected students, Lucca, stands out. Lucca has a unique, paradoxically positive yet negative outlook, believing that something bad always follows something good. In this world where emotions become magic, what kind of magical power will Lucca acquire?

"There was no heart in your mother's corpse." Kikumitsu Gemma is a high school girl who has a demon father and a human mother. This is the story of a girl who is neither human nor demon. (Source: Harta, translated)

*Note: Contains a side story and an extra.*