Ep. 4: Sumi, Sonoko, and Gin face Vertex crisis during elementary school class trip

4

Sumi Washio, Sonoko Nogi, and Gin Minowa participate in their elementary school's class trip. Their outing is abruptly interrupted when the Vertex appears, launching an advanced action that threatens to shatter their peaceful daily routine. The trio finds themselves thrust into a sudden crisis as the entity's aggressive behavior disrupts the fun and normalcy they expected from the excursion. This encounter marks a significant shift from their ordinary lives, forcing the students to confront the immediate danger posed by the Vertex's presence during their educational field trip.