Bandai Namco Filmworks unveiled the key visual, first promotional video, additional staff, main cast, and October premiere for the anime adaptation of Yū Shimizu and Makoto Aogiri’s Otherworldly Munchkin: Let’s Speedrun the Dungeon with Only 1 HP (Isekai Munchkin: HP 1 no Mama de Saikyō Saisoku Danjon Kōryaku) manga on Wednesday.

©志瑞祐・青桐良・講談社/異世界マンチキン製作委員会
The anime stars:
Kazuki Ura as Yukito Kirihara

©志瑞祐・青桐良・講談社/異世界マンチキン製作委員会
Kana Yūki as Charlotte R. Brownia

©志瑞祐・青桐良・講談社/異世界マンチキン製作委員会
Yui Ishikawa as Lumilia Sherwood

©志瑞祐・青桐良・講談社/異世界マンチキン製作委員会
Kaori Maeda as Liverna Dark

©志瑞祐・青桐良・講談社/異世界マンチキン製作委員会
Kei Yoshimizu (Zumomo to Nupepe) and Naoya Fukushi (Kaito × Ansa) are directing the anime at Durandal. Hiroshi Hosokawa is in charge of series scripts, Mamoru Yokota and Yui Katō (Kaito × Ansa) are designing the characters. Katō is also the chief animation director.
The newly announced staff members are:
Mamoro Yokota (Kinnikuman: Perfect Origin Arc animation supervisor), who was initially announced as the anime’s director, is now listed as the anime’s general director.

© 志瑞祐・青桐良・講談社/異世界マンチキン製作委員会
Kodansha USA Publishing releases the manga digitally and describes the story:
16-year-old Yukito Kirihara lives with his 14-year-old sister Sana, who he treasures more than anyone else. But when an ogre shows up outside of his window looking for Sana (a shocking event in its own right), Yukito leaps to save her—and is killed. He’s offered the promise of reincarnation by a mysterious woman, who gives him a character sheet in a mysterious book. But when Yukito sees Sana in there, too, he sets off to find her, and save them both—even if he only has 1 hp with which to do it!
Shimizu and Aogiri launched the manga on Nico Nico Seiga and Kodansha’s Monthly Shonen Sirius magazine’s “Suiyōbi no Sirius” website in February 2019. Kodansha published the manga’s first compiled book volume in September 2019, and will publish the 12th volume on June 9.
Source: Press release
Disclosure: Bandai Namco Filmworks Inc. (Sunrise) is a non-controlling, minority shareholder in Anime News Network Inc.