1-nen-a-gumi-no-monster-manga-fantasy-illustration-mystery

1-nen A-gumi no Monster (1年A組のモンスター, 1-Nen A-gumi no Monsutā; lit. “The Monsters of Class 1-A”) is a Japanese manga series written and illustrated by Hideki. It began serialization in Ichijinsha‘s Monthly Comic Rex magazine in January 2018.

Characters

Tarō Jimi (自見太郎, Jimi Tarō): Voiced by: Yoshitsugu Matsuoka (PV)
Momo Hananaka (花中桃, Hananaka Momo): Voiced by: Hikaru Akao (PV)
Tsubaki Yabu (藪つばき, Yabu Tsubaki): Voiced by: Azumi Waki (PV)
Mari Banri (万里茉莉, Banri Mari): Voiced by: Chitose Morinaga (PV)
Aoi Tenjiku (天竺葵, Tenjiku Aoi): Voiced by: Aya Yamane (PV)
Akira Akashi (明石晃, Akashi Akira): Voiced by: Masamu Ono (PV)

Media

Manga

Written and illustrated by Hideki, 1-nen A-gumi no Monster began serialization in Ichijinsha‘s Monthly Comic Rex magazine on January 27, 2018. Its chapters have been collected into fifteen tankōbon volumes as of September 2025.

No.	Release date	ISBN
1	June 27, 2018	978-4-7580-6741-6
2	January 26, 2019	978-4-7580-6783-6
3	July 27, 2019	978-4-7580-6817-8
4	January 27, 2020	978-4-7580-6843-7
5	August 5, 2020	978-4-7580-6884-0
6	February 3, 2021	978-4-7580-6903-8 978-4-7580-6904-5 (SE)
7	August 4, 2021	978-4-7580-6939-7
8	February 3, 2022	978-4-7580-6958-8
9	July 27, 2022	978-4-7580-6990-8
10	January 26, 2023	978-4-7580-8403-1
11	July 27, 2023	978-4-7580-8439-0
12	February 27, 2024	978-4-7580-8468-0
13	August 27, 2024	978-4-7580-8566-3
14	February 27, 2025	978-4-7580-8653-0
15	September 27, 2025	978-4-7580-8802-2

Other

In commemoration of the release of the series’ third volume on July 27, 2019, a promotional video was released on Ichijinsha’s YouTube channel that same day.^[1]

1年A組のモンスター *(1-Nen A-gumi no Monsutā)*
1-nen A-gumi no Monster
*First tankōbon* volume cover**
Manga
Written by	Hideki
Published by	Ichijinsha
Imprint	Rex Comics
Magazine	*Monthly Comic Rex*
Original run	January 27, 2018 – present
Volumes	15