Anata no Tame nara Mesu Dorei ni Sarete mo Kamawanai

The man took Madoka K*name to a secluded spot for her r*pe.
On the verge of teary despair her savior arrived in the form of QB,
who offered her to become a magical girl.
"If you want out of this mess you better sign a contract with me."

Confused and scared little Madoka was about to agree when Homura Ak*mi appeared.
Homura froze time with a magical wave and set Madoka free.
But now the man who was going to r*pe Madoka turned his wrath on Homura.
QB deviously interfered and disabled her magic powers.
IT HAD ALL BEEN A TRAP. Homura was the target all along. The plan was to destroy her.
And unlike Madoka, nobody was coming to save her.

[From DLsite]