Tonari no Seki-kun: The Master of Killing Time

Midway through a class at a certain school, diligent student Rumi Yokoi finds her in-class life upturned when her desk mate Toshinari Seki begins to entertain himself at his desk. While Rumi is irritated by Seki's distracting yet intricate pastime, she cannot help but be drawn into his intriguing hobby. Ever unable to focus, Rumi observes Seki's striking ways of slacking off in class.