Kobato (en) follows a kind-hearted but naive young girl named Kobato Hanato who is sent to Earth to fulfill a mysterious mission: fill a magical bottle with the healed hearts of people she helps. If she succeeds, her wish to visit a special place will be granted. She cannot fall in love with any one person, and if she fails, she will lose her memories. As she works at a daycare and befriends a troubled lawyer named Fujimoto and other colorful characters, she slowly learns about human pain and happiness. Readers enjoy the story for its sweet and emotional blend of romance, fantasy, and slice-of-life moments, with a gentle protagonist whose earnest desire to make others smile leads to heartfelt and sometimes bittersweet revelations.