休みの日は、ふらっと近所のカフェに行く。
On my days off, I casually drop by a nearby café.
ふらっと立ち寄った店で、いい本を見つけた。
I found a good book at a shop I wandered into by chance.
On my way home, I casually dropped by a bookstore.
On my days off, I often go out somewhere on a whim.
Feeling thirsty, I wandered into a nearby café.
He showed up out of nowhere without any warning.