Chuukan Kanriroku Tonegawa Episode 15

Otsuki takes another 1-day leave, but when he's about to start enjoying his timed freedom, he notices a black suit standing guard nearby, watching him. Otsuki doesn't take his presence as a nuisance, but rather, he reaches out to him and offers him some of his snacks. The black suit is caught off-guard by Otsuki's friendliness, then reluctantly accepts to jointly engage in his outings. The remaining episode deals with Otsuki's attempts to enjoy life outside to the fullest with his coworker - Numakawa-, and the latter's astonishment at how the foreman can feel at ease even with the ominous countdown to go back to their underground labour camp. Their stroll leads through restaurants, walks in the park and a carnival fair. In the end, they happily return to the dreaded mine where they have to work, with plans to go again on another 1-dat leave.