Zettai Zetsumei Dangerous Jiisan (2004)

Synopsis

Meet Grandpa Danger, the unlikely hero who excels at cliff-diving, outsmarting a principal with deep-seated insecurities, and conquering the perils of bedtime. This relentless prankster, known for his nonsensical antics and utter lack of hygiene, constantly frustrates his grandson with his excessive phlegm and flatulence, leading to uproarious comedic situations.