How clumsy you are, Miss Ueno.

Ueno, the science club president, is known for her ingenious inventions, which include devices capable of purifying water, eliminating odors, and generating dark matter for concealment. However, her inventive skills are used to tackle a more personal challenge: winning the heart of Tanaka, a fellow club member who remains oblivious to her affections. With Yamashita's help, Ueno attempts to get Tanaka's attention through a series of misadventures, using her creations in unorthodox ways to try and spark his interest. Her methods are often misguided, but her determination to confess her feelings is unwavering.