Papa ga Aka-chan ni Natta!

A young girl named Yumiko lives with her father, who is always busy with work and rarely spends time with her. One day, she wishes that her father could understand her feelings and become small like a baby. Her wish comes true, and her father transforms into a tiny infant. Now Yumiko must take care of her baby father, learning about responsibility and empathy while trying to find a way to reverse the spell. As she cares for him, she begins to understand the challenges of parenthood and the importance of family bonds.