Without emotion or interest
Lacking interest in one's surroundings or worldly affairs
Lacking or marked by a lack of care
Showing no concern, attention, or regard
You do that, and have an unconcerned night.
They seemed unconcerned that their feet were buried in snow.
She played with the lamb for a little while longer, unconcerned when both straps fell.
Rhyn righted himself, unconcerned, and barreled toward the demons.
"It's where we met last time," Gabriel said with an unconcerned shrug.