The story revolves around Tomoya Mizuhara, a 13-year-old boy who
suddenly gains a big sister when his father remarries. 17-year-old
Ichika is a little strange, and her affection for Tomoya is rather
overwhelming, if not scary. On top of things, Ichika's friend Ruri is
the ultimate sadist. Then there is Ichika's big-breasted
quarter-Japanese friend Marina.
