I come to bring sad news.

The creator of Astrea, Tonari no Botulinus, has said farewell on his pixiv account on the 31st of December 2021, and deleted his account at the start of 2022. T_T

It came to my attention that he updated "Defeated Warrior Append" a while after I posted the gallery here. Fortunately, I was able to obtain a copy of the updated version (with 92 added images), and is thus presented here.

Source (now dead): hoohttps://www.pixiv.net/en/artworks/87928155

As for the main Astrea Story:

Chapters 01-10 can be found here: http://dl.hentaiknight.work/?l=e-hentai/g/1237973/cabd12ad7d/
Chapters 11-18 are here: http://e-hentai.fbk.tokyo/index/g/1367149/f3ed4c1919/
Some hack sniped Chapters 19 & 20 from me, won't link to that gallery. :P
(Sorry if it sounded petty, but the same hack tried to snipe another story I upload, though in the end I managed to have his gallery expunged -- maybe it helped that I received the blessing of the original creator.

Alternate Bad End stories: http://e-hentai.fbk.tokyo/index/g/1324089/5156599ac7/ and http://e-hentai.fbk.tokyo/index/g/1454190/2d91a3f648/

Defeated Warrior (updated): http://e-hentai.fbk.tokyo/index/g/2153352/ca6408aba7/

Twitter and Pixiv Fanbox collection: http://e-hentai.fbk.tokyo/index/g/1758554/7e432ffe48/

QAQ rip, such a shame. Creator gave any reason?
Thanks for the uploads

Base +5

oh no, this is one of my favourite series…
But I have found some dojin of the main character, hoping someone can continue this work…

Base +6

@AhKai

One likely reason is heath--he previously posted about a hospital stay. And even before that, there was mention of not having enough free time.

Base +7