The front of her costume

After Monokuma slashed at the side of Chiaki's costume, the front of the costume fell open revealing Chiaki large breasts to both Hajime and the 50k people watching the stream. Her breasts bounced with every movement she made.

"Don't look!" Chiaki called out to Hajime as she held the front of her costume up to hide her breasts from the public.

"We've got get out of here." Hajime said as he held Chiaki's spare hand and ran with her.