[ it should be terrifying to have something so foreign inside him, but it isn't. Maybe it's because he trusts Haruki, or maybe just because he wants to see how far he could push.

That doesn't mean it's not painful. It is still something inside of him that shouldn't be there, after all. But his pain tolerance is high, and he likes where this is going ]

... Mm. Making a new heart for me? How sweet of you.