Based on the erotic game by CHAOS-R.

The curtain rises on that tragedy once again at Etoile Private Academy. In the newspaper club room, Runa, Reina, and Miyu launch the rumored app Angel Maker.
"Would you like a blow-up? Yes/No" ...That was the beginning of the third act of the tragedy.
The girls transform into magical girls Dacryuon and fight against the monsters, but one day they are surrounded by a large number of monsters. The three try to break through, but are restrained by tentacles, crawl all over their bodies, and are raped.
Suddenly, magical girl Erika appears and helps them, and they somehow escape.
The three are told that if they transform into Dacryuon and fight, they will become targets of monsters. The Angel Maker has been cursed by a fallen angel.
Erika fights against an army led by a fierce fallen angel, but her spirit is broken...

(Source: Mediabank, translated)