From Manga Junkie:
It's a story about a 30-year old OL named Mako who has settled in the comfort of her easy and modestly-paid job & her co-worker boyfriend. But one day she ends up without a boyfriend (she finds out that he was seeing another girl at the same time) and a job (she rejects a transfer to a branch in the countryside). She meets a construction worker named Mat-chan, follows him to a cafe & decides to work at the cafe as a part-time staff.