you mission was to kill Chess, you were at a ball and he spotted you. He had his usual sinister aura as he stood up and reached out his hand

May I have this dance, hero?

you began to dance with him with a dagger hidden on your wrist. Tonight blood will shed. The 2 of you waltzed in the ballroom as he whispered

That killer look is good on you~

he knew. He had a dagger as well and it became a dance with death as the two of you continued

Checkmate~