Usagi Drop. The story of a middle-aged dude whose grandfather passes away, leaving a little girl behind. He takes her in, and little do you know, it becomes a heartwarming slice of life that is so, so very sweet. I heard that the manga screws things up a bit so that things get complicated, but the anime was good. :)
By force of circumstances, a 30-year-old single man with a full-time job suddenly starts raising a 6-year-old girl. While running each other ragged, the two of them gradually grow into a “family”. This is the long-awaited anime version of “Bunny Drop”, the extremely popular and finely crafted comic by Yumi Unita. It’s a heartwarming and entertaining work that naturally depicts child-raising experiences, but also the instantly relatable warmth and noise of being in a family.