[Take the focus away from the subject. If Natsume really is from the past, then he doesn't know that Kaname's already seen them through the same eyes, when that youkai lent him her sight. He already feels as though he's walking on unsteady ground with this topic.]
[If Natsume doesn't want to say anything more, Kaname isn't going to push the subject.]
no subject
[Take the focus away from the subject. If Natsume really is from the past, then he doesn't know that Kaname's already seen them through the same eyes, when that youkai lent him her sight. He already feels as though he's walking on unsteady ground with this topic.]
[If Natsume doesn't want to say anything more, Kaname isn't going to push the subject.]