Focuses on the "Yamai Twins" and their competitive duel to decide who will be the "true" Yamai, blending intense action with fanservice.
Deals with Nia Honjou's "inversion" and the lore-heavy revelation of why certain characters remember old timelines.
Introduces Natsumi's "guessing game," where Shido must identify which of his friends she has impersonated before they disappear.