A new employee, Segawa Haruto, has arrived at the pharmaceutical company where Aihara Mei works. In the first year of working life, a trial suddenly comes to Haruto who doesn't know right or left. Haruto, who desperately followed Mei's work, had a broken heart in just one day, said, "I'm not fit for this job...". A petite growth story begins, watching over the imadoki boy Haruto-kun until he becomes a full-fledged member of society!