Meidokissa.

A struggling café is set to close at summer's end. The protagonist's nieces, saddened by the closure, want to spend their last summer together with their uncle and everyone at the café, so they decide to help out for the final month. But when they reunite, the protagonist is shocked by their unexpected maturity. Their carefree behavior proves too much for this single man in his thirties. Can he survive the summer living under the same roof with them?