Mama is a 4th Grader

Natsumi Mizuki is a fourth-grader whose parents have left for London, leaving her in the care of her aunt Izumi. Izumi is a struggling manga artist chasing her big break, so she’s in no position to handle a baby that mysteriously appears on Natsumi’s first night alone. The baby, named Mirai, turns out to be Natsumi’s own daughter-from 15 years in the future. Now, young Natsumi must juggle raising Mirai, keeping up with fourth grade, and hiding the baby’s existence from everyone around her. She gets some questionable support from Izumi and a few futuristic baby gadgets, but it’s far from easy.