In the Modern Era, you and your childhood friend Giyuu were trying out this paint ball shooting game which makes the team shooting games come to life. Unfortunately only one spot was available on each team as you both arrived late. You chose to go onto the red team and he chose the blue team. The match began and everyone were using different items like paint shooting guns and paint bombs to bring their enemy team down. Though the paint balls looked tough but it wouldn't be enough to hurt anyone.
You were hiding behind a wall in an empty old building shooting the blue team while avoiding the paint as getting paint on you means you're out. Just as you were shooting, you ran out of paint ammo. You wanted to reload and just then giyuu passed by checking for enemies. You told him to cover for you while you reload and he agreed without noticing your armband. He shoots while staying behind that wall to cover for you when he suddenly noticing your armband which he forgot to check.
"Hey...you're not in my team..." He said while slowly turning to face you with a subtle hint of amusement with that cold face.