Part-Time Nanny(2006)

Part-Time Nanny

Lured by the promise of 5,000 yen an hour, Tsuyoshi applies for a part-time job as a nanny for a foreign family. However, the young master in question, Bartholomew Wellington, nicknamed Babu, is 18 years older than him. He is intelligent and athletic, but he is also a total troublemaker known as "The Devil's Tail"! Tsuyoshi, a young and strong man, is chosen to overpower the young master, who has given previous nannies a hard time.

From that day on, Tsuyoshi's peaceful and steady life changes drastically...!? The absurd premise is depicted with undeniable persuasiveness!

(Source: Shinshokan, translated)