18 Roughs (movie, 1963)

Experienced shipyard worker Shimazaki gets an offer of free lodging from his employer in the company seaside rest house if he agrees to see to its running. After moving in, Shimazaki finds out that this will also mean taking care of a flock of youngsters, and he soon becomes their none-too-successful warden. At work the boys are disciplined, as soon as they return to their dormitory however they turn into an unmanageable mob.