They opened their eyes to reveal what looked like a stage and a bunch of monokumas in different outfits.

They were on a stage and above the crowed the ultimate could see 'Romeo and Juliet'

They were Juliet/Romeo (whichever character you prefer)

They were forced to act while the audience would boo and throw tomato's at the ultimate.

They managed to dodge whatever was thrown at them until the ending

(If you were Juliet)

They grabbed and knife was forced to put it up to their chest as if they were being controlled... and slowly. Their skin was pierced. Slowly killing them

The ultimate held the bottle of poison saying 'monokuma's special poison' in their and and slowly drank it

They had a sudden pain in their chest and everything went blank