Fate/Grand Order -Epic of Remnant- Pseudo-Singularity III: The Stage of Carnage, Shimousa - Seven Duels of Swordmasters 6

Ritsuka and her allies are raided by Kalasutra Hell and Samghata Hell, and two children under their supervision, little Onui and Tasuke, are taken hostage. In their haste to rescue the children, Ritsuka tumbles down a cliff alone, dropping her into cruel trials prepared by the playful oni. Two wicked fiends of immense power await the heroes' arrival…and once the battle begins, there will be no turning back.