Hero knew girl Hime when he was a child. She had a soft old-fashioned character. Now he meets her in Tokyo and she's totally different. It turns out that Hime suffers from personality disorder and each day of week she's a different person - seven in total. Hero asks gets a permission to look after Hime for a month to try to heal the distortion. Can he change Hime in just 4 weeks of living together?
All that is left to the hero.

[From vndbreview]