Tu Bian Yingxiong Baba

Uncle is a handsome but irresponsible single father who would rather flirt than take care of his daughter, Min-chan. One day, he is sucked into a toilet and recruited by an interstellar organization to become Earth's champion. The transformation gives him extraordinary power, but it also changes him into a short, heavyset man whom his own daughter refuses to recognize.

Unable to reveal his identity, Uncle has to protect Earth from increasingly bizarre alien threats while somehow repairing his relationship with Min-chan. With strange allies, ridiculous enemies, and his own shameless personality working against him, saving the planet may prove easier than convincing his daughter that her embarrassing new protector is really her father.