Ensemble of the Eldren Valkyries

Ensemble of the Eldren Valkyries (歴戦乙女のアンサンブル) was a story event in Assault Lily: Last Bullet, starring Shirai Yuyu, Serizawa Chikaru and Yoshimura Thi Mai, with Amano Soraha and Banshoya Ena in supporting roles. It ran from July 20, 2021 to July 31, 2021.

Translation
The complete English translation of Ensemble of the Eldren Valkyries can be found here in Google Doc format.

There is also a full set of subtitled YouTube videos by GEHENA Subtitle Labs.