To celebrate the end of the semester, Senpai decides to perform a " disappearing act" on Assistant. She builds a poorly constructed box intended to make him vanish. Assistant is skeptical and terrified (rightfully so, as the box has sawblades involved), but he reluctantly complies. The trick goes exactly as wrong as expected—the box collapses, and Senpai gets stuck inside instead. As she struggles to get out, she disappears from view, and Assistant realizes he is finally alone... but he finds he actually misses the noise and chaos. He pulls her out, and the episode ends with them walking home, promising to do it all again next year.