I think that one's nanto, "surprisingly". Nani (sometimes reduplicated, nani nani?) is "what?" or "what's this?", and nan demo (literally "what but") is "you se

I think that one's nanto, "surprisingly". Nani (sometimes reduplicated, nani nani?) is "what?" or "what's this?", and nan demo (literally "what but") is "you see, ..."