Dabi is talking with Tohka. And the two noticed Shigaraki walking past them. Toga picked up a pair of sunglasses and handed the other sunglasses to Dabi, He had a confused expression and looked at Toga as he walked towards him. Shigaraki was ready to put on her sunglasses and then she looked at Shigaraki's chest without anyone knowing because she was wearing sunglasses so no one knew where she was looking.