Mirai no Mirai

Four-year-old Kun is used to having his parents' attention all to himself, so the arrival of his baby sister Mirai feels less like a happy change and more like an invasion. Jealous and frustrated, he struggles with a home that suddenly no longer revolves around him.

Then the family garden becomes a doorway to impossible encounters across time. Meeting relatives as children, adults, and even versions of his family he has never known gives Kun a new view of the people around him. Through these strange journeys, he slowly begins to understand what it means to belong to a family and to become Mirai's older brother.