Feeling reluctant to leave or see something end; wishing it would continue (similar to 名残惜しい).
旅行の最終日、みんな残り惜しい気持ちで写真を撮った。
On the last day of the trip, everyone took photos with a feeling of reluctance to leave.
彼とは別れるとき、いつも残り惜しい思いが残る。
When I part with him, I always feel reluctant.
子どものころの友達との日々が残り惜しくて、アルバムを捨てられない。
I can't throw away the photo album because I'm reluctant to let go of my childhood days with friends.