Yumeko Koda is a self-loathing young woman who is consumed by anxiety about her weight. However, an ‘accident’ sees her wake up in hospital with no knowledge of who she is – and a complete change in personality. Now outgoing and confident, she resumes company work with a newfound positivity – even when dealing with a suspected attempted murder and coworkers who must come to terms with Yumeko’s new bubbly self.