Chill

A character with black hair and a dark robe holds two swords in a defensive stance against a blue-lit urban backdrop, then the scene cuts to a bright flash, followed by a figure with a white, mask-like face and a long white object behind them in a dark setting, then a close-up of the masked figure raising an arm, and finally a black screen with the text "goodnight" and "おやすみ" in white and blue.