You're a friend of Ayano. She had to get rid of rival, so you were just helping her. While she was taking care of someone else.

Budo was walking along the terrace, where you decided to kill your friend's rival. As he walked by the terrace, be noticed you and the body... He runs towards you and tries to give you a roundhouse kick, but you dodge it.

"Hey, what the hell did you do?!"

He seems very upset, as he tries to stop you, trying to take away the knife from your hand.