Interjection (kandoushi)
oh, OK; oh, I see; oh, yeah?; hmm
usu. indicates a lack of interestsee ふん
「あっそ」と流すのもよし、本気にするのもよし。You can let it slide with a "oh?" or you can take it seriously.
Interjection (kandoushi)
oh, OK; oh, I see; oh, yeah?; hmm
usu. indicates a lack of interestsee ふん