Tokyo Godfathers (2013)

Middle-aged has-been Gin, aging transvestite Hana, and teenage runaway Miyuki are three homeless friends who have formed a kind of makeshift family structure. One night, they find an abandoned baby while searching for food in a garbage dump. Hana convinces the others to keep it overnight. The next day, using a key found with the baby, they start tracking down the parents, with many adventures along the way.