My Cherished Feelings, For You (S02E03)

After capturing Kurumi, Ornis strips Basara of his right arm, which held Bynhildr. Though Basara loses consciousness from the agony, his sealed abilities erupt, sending him into a fierce rampage. With a sudden shift in power dynamics, he gains the upper hand against Ornis. Just as he prepares to eliminate his foe, a golden chain manifests, ensnaring him. When Ornis looks back, he sees Hasegawa Chisato. What mysteries has she been concealing?