Yokoi-san is trying her best to listen in class, but she can't help but watch as Seki-kun is lining up erasers next to her. Seki-kun! Are those dominoes?!
Seki-kun starts shining his desk during class. Amazed at the effect of his work, Yokoi-san finds herself being dragged into his want to shine more desks.
Seki-kun starts playing Go on his desk. Yokoi-san tries to ignore this since she doesn't know the rules, but this yet again turns into something rather unexpected.
Whilst participating in a disaster drill, Rumi notices that a robot family that Seki has brought into class is taking the drill more seriously than Seki himself, prompting her to take responsibility for them.
Seki creates an elaborate post office system for passing notes around the class; with many protocols that prevent Rumi from giving him a note of her own.
During art class, Seki plays a miniature-sized game of golf on his worn-out desk, whilst Rumi's classmate, Sakurako Gotō, misinterprets the interactions between Rumi and Seki as romantic gestures.
Rumi watches in harrowing anticipation as Seki has a group of miniature bears do a mountain climbing expedition on the back of their classmate, Takahiro Maeda.
Seki studies a set of driving rules, takes a written driving test, and then makes a driving course on his desk for a remote-controlled car, which he takes very seriously.
During water safety lessons, Rumi once again becomes invested in the diligence of the robot family, becoming panicked when the child robot is thrown into the pool by Uzawa.
Whilst Rumi is off school with a cold, Goto observes Seki as he plays a game of paper sumo involving a robot opponent, assuming he had a fight with Rumi.
As the class watches an instructional video, Seki plays a game of "Shogi vs. Chess" in the dark, with Rumi eager to help the shogi pieces as they struggle against the black chess pieces hidden in the darkness.
With their desks pushed together in order to share a printout, Rumi attempts to ignore Seki as he performs some card tricks, hoping to prompt a reaction from her.
Rumi learns of a surprise belongings inspection, believing it to be the perfect chance for Seki to get busted. However, she becomes concerned about the robot family, especially when Seki seems to make no attempts to hide them properly.