Adachi and Shimamura happened to meet each other on the second floor of the gymnasium as they were skipping class. Eventually, they started seeing each other more and started playing ping-pong together.
Shimamura meets a little astronaut named Yashiro. Shimamura and Adachi also decide to attend class for once and Adachi starts questioning how she actually feels about Shimamura.
Shimamura worries about Adachi when she doesn't come to school the next day after she abruptly left her house. The two girls go out together on the weekend and an unlikely guest joins them.
Shimamura just happens to run into Adachi's mom at the gym and they have an awkward encounter. Later on, Shimamura invites Adachi to karaoke with Hino and Nagafuji.
Adachi tries to ask Shimamura if she'd like to hang out on Christmas, but has a very hard time getting the words out. Meanwhile, Shimamura wonders why Adachi's been acting so weird lately.
The girls welcome the new year and Adachi seems to be acting weird again. She later tries to ask Shimamura if she'd want to hang out on Valentine's Day.
Valentine's Day finally arrives and Adachi and Shimamura hang out as promised. But this time, it's actually Shimamura that has a surprise in store for Adachi.
