The Most Heretical Last Boss Queen
is a Japanese light novel series written by Tenichi. The series originated on the Shōsetsuka ni Narō website in April 2018, before being published in print with illustrations by Suzunosuke by Ichijinsha beginning in June 2019. A manga adaptation, illustrated by Bunko Matsuura, was serialized on the Zero-Sum Online website between March 2020 and March 2022. An anime television series adaptation by OLM aired from July to September 2023. Characters

Pride is the main protagonist, being a reincarnator. The original Pride was a monstrously selfish woman who callously abused everyone, being seen as a devil in human form; only to eventually meet her end at the hands of her younger sister. The current Pride uses her memory of the original timeline to save and protect everyone that would have been abused by her; unintentionally causing them and herself to have glimpses of the original timeline. Whenever she makes alterations to the current timeline, the actions of her original self are seemingly imprinted onto others who carry them out in her place. Stale is the adopted brother and assistant of Pride and possesses the power of teleportation. The original Pride placed him under a magical contract which forced him to obey her, taking advantage of his inability to read, and then ordered him to murder his birth mother. The current Pride has treated him with great care and compassion, notably allowing him to communicate with his birth mother, and so earning his loyalty and love. Tiara is the younger sister of Pride and would have been the protagonist in the original version of events. Arthur is the son of the Knight Captain who possesses the power to improve the vitality of plants. In the original timeline, he watched as his father died in battle while the original Pride mocked the fallen soldiers, leading him to swear vengence against her to the point of not allowing the original Tiara to get close to him due to her relation to Pride. The current Pride used her skill to enter the battle herself, saving his father's life and earning Arthur's loyalty. Media

Light novel
Written by Tenichi, the series began serialization on the novel posting website Shōsetsuka ni Narō on April 19, 2018. The series was later acquired by Ichijinsha, who began publishing the series in print with illustrations by Suzunosuke on June 4, 2019. As of August 2023, seven volumes have been released. In June 2021, Seven Seas Entertainment announced that they licensed the series for English publication. Volume list

Manga
A manga adaptation, illustrated by Bunko Matsuura, was serialized on Ichijinsha's Zero-Sum Online website from March 19, 2020, to March 18, 2022. As of January 2022, the series' individual chapters have been collected into three tankōbon volumes. In October 2022, it was announced that the manga adaptation had been cancelled due to the poor health of the artist. A new manga adaptation, illustrated by Akiko Kawano, began serialization in Ichijinsha's Monthly Comic Zero Sum magazine on June 28, 2023. Seven Seas Entertainment is also publishing the manga adaptation in English. First manga

Anime
An anime television series adaptation was announced on October 28, 2022. It is produced by OLM and directed by Norio Nitta, with Deko Akao writing the scripts, Hitomi Kōno designing the characters, and Hanae Nakamura, Tatsuhiko Saiki, Kanade Sakuma, and Junko Nakajima composing the music. It aired from July 7 to September 22, 2023, on Tokyo MX and other networks. The opening theme song is  by Tsukuyomi, while the ending theme song is "Pride" by ChoQMay. Sentai Filmworks licensed the series, and is streaming it on HIDIVE. Muse Communication also licensed the series in Asia-Pacific. Episode list

Reception
In 2021, the manga adaptation was nominated for the Next Manga Awards in the web category. Notes

References

External links
  at Shōsetsuka ni Narō 
 First manga website at Zero-Sum Online 
 Second manga by Akiko Kawano at Zero-Sum Online 
 Anime official website 
 

2019 Japanese novels
2023 anime television series debuts
Anime and manga based on light novels
Fiction about reincarnation
Ichijinsha manga
Isekai anime and manga
Isekai novels and light novels
Japanese fantasy novels
Japanese webcomics
Light novels
Light novels first published online
Muse Communication
OLM, Inc.
Sentai Filmworks
Seven Seas Entertainment titles
Shōjo manga
Shōsetsuka ni Narō
Tokyo MX original programming
Webcomics in print