Bunny girls do not live inlibraries. This is simply common sense. And yet, that's exactly where Sakutaruns into one in the wild. More bewildering is who the bunny girl is: MaiSakurajima, an upperclassman and well-known actress currently taking a breakfrom industry work. Wanting to find out more about the mystery surrounding Mai(and maybe get a little closer to her in the process), Sakuta launches aninvestigation to figure out what's making this bunny girl invisible to everyonearound them.