Osamu Nishi

A special, two-part side story manga set in the world of Mairimashita! Iruma-kun, focusing on Naberius Kalego during his days as a student of Babyls Demon School.

They'll hunt any monster gently, no matter how dangerous!! Gold and Silver are the expert hunter brothers!

Hopeless pushover Iruma Suzuki has found himself in a devil of a predicament... His trashy parents have sold off his soul, and he now has to live and attend school in the Netherworld. But with his unique survival skills and doting demon grandfather’s support, Iruma will surely make it through this hellish experience. He'll just need to subjugate rival classmates, summon familiars, and more, all while never revealing that he's human... Easy as aleph, bet, gimel, right?

Arcaspia, the "world of creatures," is home to all manner of mythical and fantastic beings - including the undead. To maintain order in Arcaspia and enforce laws upon these dangerous individuals, the Dead an Dead organization was formed. Notorious Dead an Dead agent number 666 Nico Alsbarn (colloquially known as "Legs Russo" for his perpetually blood-stained legs) takes on an undead invasion in this oneshot by Osamu Nishi!

Tanaka-san is a legendary hotel man (concierge), and after his death, he became a legend in the underworld. In the underworld, Mei works at the dilapidated Hotel Helheim. It was once a glorious hotel, and one where Mei has many fond memories. One day, Tanaka-san appears, ready to restore the Hotel Helheim to its former success. Mei will become the famous Tanaka-san's assistant, as he works to make Hotel Helheim a top-class underworld hotel! Originally published in Jump Square as a 3-volume series from November 2014 to September 2015, the series was later republished under the Shonen Champion Comics label from December 2019 to January 2020. The volume count reflects the republished version, as it is the only one currently available.

An official Mairimashita! Iruma-kun anthology series, featuring stories of Iruma Suzuki and friends's adventures as students of Babyls Demon School.Chapter numbering is in order of release.TABLE OF CONTENTS (VOLUME 1):CHAPTER 1 - Iruma-sama Caught On Camera! Mangaka: Hachi (The Witch's Bloody Paintings) Eiko and Asmodeus meet in private to share with each other some photos that they've secretly taken of Iruma.CHAPTER 2 - I Just Haven't Given It My Best Yet Mangaka: Saori Muronaga (All Alone in Hyakki Demon Village) Opera laments their inability to get a good photo of Iruma, so they decide to train with Iruma in order to do so.CHAPTER 3 - Detective Iruma Case File: The Missing Fluff Mangaka: Nango Kouta (Kojirase Hyakki Dominor) After playing a mystery game, Iruma and Lied get bitten by the detective bug. But when Elizabetta discovers that her tail scrunchie is missing, can Iruma Holmes and Lied Watson figure out the culprit?CHAPTER 4 - As Expected From Kirio-senpai! Mangaka: Shinobi (Yandere Kanojo) A day in the life of Kirio, Iruma’s senpai who secretly has an obsession with seeing people in despair.CHAPTER 5 - I Can't Wake Up! Iruma-kun Mangaka: Rio (Despair Boy and China Girl) Asmodeus and Clara come across Iruma sleeping, and compete against each other to see who will wake him up first.CHAPTER 6 - Clara’s Seduction Challenge Mangaka: Sako Misaki (Doki Doki Yokai Love Battle! ~ Great Yokai War!) When Clara’s succubus mentor teaches her about enchanted chocolate that will make the consumer fall in love with its creator, Clara naturally tries to see if she can make chocolate that will make Iruma act lovey-dovey towards her.CHAPTER 7 - Azz-kun's Devilum Mangaka: Shimotsuki Seira (Sewaga Yakemasu Hades-sama) Iruma and Clara ask Asmodeus what he normally does during Devilum balls.CHAPTER 8 - Once Again... Please, Opera-san! Mangaka: Nagi Mayuko (My Student Won't Go Back Home) Amelie asks Opera to help her improve her cooking skills.CHAPTER 9 - That's a Mythical Creature, Iruma-kun! Mangaka: Yoshimatsumetsu (Akuyaku Reijo no Ani ni Tensei Shimashita artist) Iruma’s class discusses their efforts as children to find the delicacy known as humans - while the human Iruma tries to change the subject.CHAPTER 10 - Evade Them All! Iruma-kun! Mangaka: Kakemaru Kakeru (Shonen Racquet) Clara decides to put Iruma’s danger avoidance skills to the test with a massive gauntlet of traps.CHAPTER 12 - The Irumi in Our Hearts Mangaka: Fukui Takumi (Shuumatsu no Valkyrie writer) Iruma’s classmates discuss the mysterious new idol Irumi who suddenly appeared at a concert beforehand.CHAPTER 13 - Amelie's Heart-Pounding Grand Campaign Mangaka: Sakurai Norio (Boku no Kokoro no Yabai Yatsu) After reading shoujo manga, Amelie seeks to replicate romantic moments from them with Iruma.CHAPTER 14 - Iruma-kun and the Cherry Blossom Viewing Party Mangaka: Itagaki Paru (BEASTARS) Iruma, Asmodeus, and Clara set up a cherry blossom viewing party.CHAPTER 15 - ??? Mangaka: Heriyama (Governess Nazuna-san)TABLE OF CONTENTS (NO VOLUME):CHAPTER 11 - Break them Bones! Bablys Staff Mangaka: Kawasaki Chuu (Shuumatsu Busou Pancake writer) The Babyls teachers participate in an arm-breaking (arm-wrestling) contest.CHAPTER 16 - ??? Mangaka: Abekawa Kineko (Touken Ranbu Anthology ~ Preparations For Departure!)CHAPTER 17 - ??? Mangaka: Kobayashi Moriwo (Melancholy Melancholic Melancholinist)CHAPTER 18 - ??? Mangaka: Suzuki Iko (One Step!)CHAPTER 19 - ??? Mangaka: Kuze Mizuki (Shuumatsu Friends)CHAPTER 20 - ??? Mangaka: Utagawa Utako (Jitsuwa: Fukakaidan Kissa)CHAPTER 21 - ??? Mangaka: Tatsubon (Tadokoro-san)Chapter 22 - ??? Mangaka: Saito Michi (The Rising Of The Vibrator Hero)Chapter 23 - ??? Mangaka: Tachibana Mizuki (Seishun Radio Pinchers)Chapter 24 - ??? Mangaka: FUKASAWA Neji (He is popular, but he is not good at love)Chapter 25 - ??? Mangaka: Takewakamaru (Gurenki - Creo the Crimson Crises)Chapter 26 - ??? Mangaka: Fujino Pochomukin (Kayou Koukyuu no Hanayome)

A spin-off manga featuring Iruma Suzuki, Shax Lead, and Soi Purson - the three of which make up the titular "Boku Alliance" - as they play various Netherworld video games.

In this world, witches must hunt down their magic! Deep in the forest, the terrifying king of magic and the strongest witch are locked in deadly combat. But suddenly, a young boy joins the fray. His name is Ichi and he is just a hunter. But he has the power to flip the magic world upside down in this magic hunting fantasy epic!

Shaoron Teufel is an ambitious demon who has enrolled in the demon school known as Babyls, aiming to become popular and join the Student Council. However, a number of trials await him as soon as he arrives! Being recruited by a shady division, summoning a familiar, participating in a flying test… Will Shaoron be able to stand out even more than the special student, Iruma-kun? A collaboration between Mairimashita! Iruma-kun and a popular Japanese YouTube channel, We are the Main Characters of ◯◯! We are the Main Characters of ◯◯! channel