Source: https://www.pixiv.net/en/artworks/87928155

Additional new scenes for the artist's earlier work "Defeated Warrior": /g/1757800/9bf488c983/

The new scenes seem to be interspersed with existing ones from the earlier work, so I can't call this a direct sequel. The artist has not mentioned where the new scenes go to, so it makes sense to upload them as a separate gallery.

Aorai Senshi Astrea main story:
Ch. 01-10 /g/1237973/cabd12ad7d/
Ch. 11-18 /g/1367149/f3ed4c1919/
Ch. 19-20 /g/1575987/8be2786d67/

Bad End IF stories:
Ch. 01-08 /g/1324089/5156599ac7/
Ch. 07 Remake /g/1454190/2d91a3f648/

Sadly, as of today, the author has deleted his account and thus this series has definitely ended...

Base +7, huanggonggong +4, the_conservation +5