Yume no Yu no, Yume no Youna Hibi

"Yume no Yu" is a long-established public bathhouse that has been in operation since the Edo period.
Tomohiro Nakagusu has worked hard to preserve the bathhouse he inherited from his parents, but he is forced to close because of the lack of business in modern times.
However, on the last day of business, he discovers an old wooden box in a corner of the boiler room, and the bathhouse, which was on the verge of collapse, will make a great comeback!

(Source: Comic Nova, translated)