The Hyper-Efficient Girl
K1, J5: Rentaro encounters the smartest student in school, Eiai Nano, and it turns out she's a soulmate, too; her extreme rationality leads him to question whether they really are meant for each other.

K1, J5: Rentaro encounters the smartest student in school, Eiai Nano, and it turns out she's a soulmate, too; her extreme rationality leads him to question whether they really are meant for each other.