何なんとはなしに

adverb

for no particular reason; somehow or other; without thinking

Expresses doing something without a clear reason or intention, often with a nuance of absent-mindedness or vague impulse.

• 何なんとはなしに空そらを見み上あげた。

  I looked up at the sky for no particular reason.

• 何なんとはなしに彼かれのことが気きになった。

  Somehow or other, I found myself thinking about him.