He never cared much about pain. He had dealt with it for many centuries already, being teased with relief only to fall into despair once again. Inner pain wasn't new to him.
Physical pain wasn't new either. As he trained his body and mind to cast spells and battle, he would be hurt, sometimes mortally had he had been a normal human.
So, when Kurogane had asked if it hurt, Fai's first response was not a yes, or a no, but was simply, "How could it when you're being so gentle?"
The ninja was not the most kind person, and his hands were calloused from years of swordsmanship. Hearing the word 'gentle' being associated to his fingers, really any part of him, was confusing. It took Fai chuckling at him to remember the past he had been shown before Japan, before landing unconscious at his home.
Fai had barely known gentle. What little he had seen came from the man Kurogane had just murdered with his own two hands. The same hands, well, remaining hand, that was now 'gently' caressing Fai.
Kurogane shifted so Fai would lean closer to him, "This is new territory for you, and you aren't the least bit afraid."
Fai hummed and touched their foreheads together, "I have nothing to fear from you. I doubt you could hurt me even if you tried."
Kugane let out a breath and set his fingers free. He felt Fai's shudder, but moved his hand to cup the wizard's cheek, "I'll hit you if you deserve it."
Fai laughed hard, "I'll keep that in mind. In the meantime... Can I ask something of you?"
Kurogane quirked his brow, wondering why he even had to ask at this point.
Fai laced their fingers together, "Don't look at me like that... I just wanted... I want to hear you say my name."
It took a moment to realise what Fai actually was asking for. Kurogane had called him 'Fai' plenty, using it between the 'you's and 'mage's. However, that wasn't Fai's name. Kurogane had never met 'Fai.'
The ninja took in a breath and whispered, "Yuui."
It was uncertain, as was Fai's reaction, but this was learning experience for both of them.
"Again?" Fai asked quietly.
Kurogane nodded and whispered in Fai's ear, "Yuui. My beautiful Yuui." His lips ghosted Fai's cheek when he moved to at his face once more, "I think I like your name."
Fai buried his face in Kurogane's shoulder, "For the first time in years, I think I like it too."