Kamisama Minarai: Himitsu no Cocotama

This is a story of little gods born from the thoughts and feelings people pour into the objects they cherish. The Cocotama wear pieces of their eggshells as underwear, a sign they're still in training. They wield a strange magic and work hard to become proper gods, learning to assist the humans they live with. Though they try to help by secretly finding lost items, they often mess up along the way.