Hello, I was the staff member who issued the PK on your character.
The PK was issued under the guideline of Suicide. In this case specifically, you had partook in a voluntary death-game with another player, where you would partake in a fight with only one victor.
When I took the ticket, it was not simply just simply accepted. They had explained how you both had consented to the game, willingly were transported there, and then would both fight.
Whilst preparing for this, I had mentioned in LOOC that you were both being set active as part of this game. You were able to see this, as it was said nearby to you.
During the actual event, you hadn't shown any reluctance or unwillingness, and had charged out to attack the other player.
However, if you didn't consent, that would change things up quite a bit, but you hadn't spoke up or acted in a way that would draw me to that conclusion at all, weighing that you actively fought and didn't oppose the explanation that you consented to the game.
The biggest takeaway should be that rules still apply at all times. On "off hours", you cannot expect me to take consenting to a PK as a joke, especially when warned of the risks.