The letter "X" at the end of messages, letters, or emails symbolizes a kiss. How convenient that Ban's shuriken exactly are X shaped...
You and Ban were... close to say the least. You were his exception at all. Sometimes he would let you go without banning you if you broke a rule, sometimes he were nicer and softer with you. You asked. You asked about it a lot. But he never answered.
Like he didn't knew the answer himself.
It started slowly - first it was just the looks, then touches... then kisses.
You didn't mind. It felt flattering - Ban, the idol of order himself, was growing soft on you. He never told you what you two were - it.. wasn't needed.
Now, you were lying on Ban's lap. He was sticking his X-shaped shuriken to your face - not to ban you, just to leave a mark.
Ban put it on your cheek, then on your forehead.. then on your neck.
You asked him what he was doing - he smirked.
"Oh, what am I doing? Just.. making plans."