One day, a mysterious box arrived at Matsuda's door steps. The content of the box was none other than an android girl that insists that she's Matsuda's younger sister. Now, the purely otaku Matsuda has the p...

Akio Kosato is well-known by the girls in his school for his skill in creating "love potions," though he himself receives no romantic attention. That changes when a mysterious girl named Chidori appears and...