Danganronpa: Redemption of the Pitiful

Spoilers for the following:
Danganronpa: Trigger Happy Havoc
Danganronpa 2: Goodbye Despair
Danganronpa V3: Killing Harmony
Danganronpa Another Despair Academy
Super Danganronpa Another 2

Disturbing content ahead. Reader discretion is HEAVILY advised.

Kokoro remembers the first---and only---trial she took part in at Utsuroshima. Yuri's killer was Hajime. That was a fact.
It was also a fact that she died only a couple of days afterwards.
Another fact was that her true memories had returned after her death, and she found out that she was a child abuser.

Now, a voice is telling her that she can save herself and 13 others from going to hell. There's only one condition: She must survive a different killing game amongst sinners and killers.

(Yes, a killing game with less than 15-16 people.)