The school's midterm exams have been graded, and Rentarou and the girls are about to get their test results. But first, Rentarou needs to get his phone from the classroom. The classroom is empty except for one girl. Rentarou beckons her outside, but she flatly says she already knows she'll be at the top, triggering a ZING!! when she looks at Rentarou. Despite this soulmate shock, she continues to rebuff Rentarou's suggestions to look at her scores. The boy concedes and regroups with the other three girls. Hakari ranks 25 out of 240, Shizuka ranks 44, Karane ranks 87, and Rentarou ranks 88. Rentarou then sees the top ranked student in the school, Nano Eiai, and asks the other girls if they know her.
Later that day, Rentarou and Nano are paired together in science class, where they have to look at onion cells through a microscope. As Rentarou prepares the experiment, Nano starts copying the textbook diagram into her worksheet, claiming this method to be more efficient than using a microscope. Rentarou's pleas to do the experiment properly only get her to use the microscope to look at the textbook diagram. Rentarou's daze at the school's rumors of her being an android causes him to cut his finger by accident, prompting Nano to lick the cut to clean it. Meanwhile, the other girls are working together on the experiment.
After school, Rentarou tries to get Nano to open up, but she continues to rebuff him on the ground of him being an insignificant part of her routine. But when she gets home, she finds herself swamped with thoughts about Rentarou and is unable to focus on her studies. She tries writing out the decimal expansion of pi, but it only works for a short while before she ends up writing it on every visible surface. The next day at school, she confesses to Rentarou only to try and reject him. But Rentarou, having been rejected 100 times before, knows that she does have true feelings for him, and decides to prove it to her.
Tropes:
- Finger-Suck Healing: Nano performs this on Rentarou after he accidentally cuts his finger.
- For Want Of A Nail: If Rentarou had not forgotten his phone, he would not have met Nano (at least not immediately).
- Room Full of Crazy: By the time Nano realizes that writing out the decimal expansion of pi isn't helping her regain focus, every visible surface in her room is covered in numbers.
- What Is This Feeling?: Nano asks herself this when she finds herself losing focus due to having fallen in love with Rentarou.
