Takasugi-San's Obento Vol. 1 (manga)

Harumi may be finished with graduate school, but he's 31, unemployed, and not exactly living the dream! But when a beloved aunt passes away and leaves him in charge of his striking young cousin Kururi, Harumi suddenly feels his dull, depressing days take on an exciting new flavor. Can a hapless post-grad help a severely shy junior chef come out of her shell? And will the unlikely duo learn to both cook and live in sweet harmony?