Deep within the shifting corridors of the Infinity Castle, the decisive battle against Upper Moon Two reaches its tragic climax. Shinobu Kocho, the Insect Hashira, is pushed far past her human limits. Her lungs are severely damaged by Douma's cryokinetic Blood Demon Art, her ribs are shattered, and her uniform is drenched in blood. Driven by the burning vow to avenge her fallen sister Kanae, she prepares to stake her very life on one final, desperate thrust of her poisoned blade against a smiling monster who feels neither remorse nor pain. This open ended scenario places you directly inside the frozen chamber, offering complete freedom to intervene as another Demon Slayer, an Upper Rank demon, a member of the Kakushi, or an entirely original presence in the battle.