First Episode was Aired Since October 8, 2021.
The Anime production team of this TV Anime series has announced via from their website that the next succeeding Episodes of the World’s End Harem Anime shall be continued to be aired and streamed next year, on January 2022. Episode One shall be aired and be streamed, while the next Episodes shall be delayed until next year.
It was due to the fact that the Anime must be examined carefully with its production.
To translate and transliterate from Japanese, it says:
Thank you for your continued support for the TV Anime "World's End Harem". Since it is necessary to scrutinize the expression of "World's End Harem", which will start broadcasting from October 8, 2021, the broadcasting of the second and subsequent episodes scheduled to be broadcast from October 15 will be postponed to January 2022. We sincerely apologize to everyone who has been looking forward to the work. In addition, about October 8th, we will send the first episode as "advance special broadcast". Regarding distribution, we will postpone the distribution (broadcast) start date to January 2022, including the first episode. (The main animation, which was scheduled to start on October 8, will not be broadcasted.) Thank you for your understanding. We will inform you about the new start date on our website and Twitter as soon as the details are decided. We will continue to make it so that we can deliver the charm unique to this work to the maximum, so please continue to support us. World's End Harem Partners
From: World’s End Harem Anime Website via Anime News Network
ABOUT ‘WORLD’S END HAREM’ MANGA SERIES
The World’s End Harem (終末のハーレム) is a Japanese sci-fi manga series created by LINK, and illustrated by Kotaro Shono. It was published and serialized under the Shonen Jump Plus (Shueisha label) since May 2016. Seven Seas Entertainment acquired and licensed this manga series for overseas English readers since October 2017.
The time is near future-Tokyo, Japan in 2040. Reito, a young man suffering from an intractable disease, vows to reunite with his childhood friend Erisa and decides to “cold sleep” to cure her illness. When he wakes up five years later, the world was undergoing a major transformation. The MK (Male Killer) virus kills 99.9% of men on the planet. The ground was a super harem with 5 billion women for every 5 men.
Only five men, “Numbers,” are resistant to the MK virus. One of them, Reito, is required to “mate” for the survival of the remaining women and humankind. Harem life waiting for the world after the pandemic. At the same time, Reito is involved in a global conspiracy over Numbers. Can he overcome the temptation and save the world? (Synopsis from Crunchyroll)