I don’t know…

A dark-haired anime character with blue eyes looks forward as a subtitle reads "I want you to show me that sight again," then the scene cuts to a side profile of two shirtless characters, one with dark hair and the other with blue hair and red glasses, before shifting to a scene where the dark-haired character, now wearing a black suit and a mask with red markings, stands with a blonde character and another character with blue hair, and a red symbol appears on his forehead.