Smiles
Sometimes Kurogane wanted to beat the wizard and knock the stupid smile off of his handsome face. He wanted to tell him that it was okay to not smile. That it was an okay thing to not be happy all the time. It was a very creepy thing, to think that Fai would always plaster on his stupid smile.
At night however, Kurogane could hear the nearly silent sobs that tormented the wizard. He could feel the bed shuddering under his slight form, trembling as he shook with his mourning sobs. Fai wasn't happy, he wasn't close to what happy was but he continued to pretend. E continued to assume the smiling idiots façade.
Kurogane wanted to force the thin idiot against the wall and make him not smile. He didn't want to see the stupid smile on his face. He wanted to see what Fai looked like without his stupid smile. He'd managed to worm his way into Kurogane's mind, forcing the ninja to protect him, though he didn't really want to. He wanted to know the real Fai. He was determined to know who Fai was and what Fai was running from.
He wouldn't admit it, but he would watch. He would listen and he would learn. He was determined to know Fai but he was unable to admit to him his desire.
Fai smiled at Kurogane couldn't stop the urge to help him, to comfort him.
During the day, Kurogane pretended not to care. At night, he fought to keep himself away from Fai.
After all, Fai's smiles were always going to be there.