Tonari no Seki-kun: The Master of Killing Time

The original manga revolves around a girl named Yokoi who sits next to a boy only known as Seki-kun. During class, Seki-kun continues to not pay attention and instead creates amazing little distractions, such as a detailed golf course with the course's hole being a dent in his desk, or an entire dramatic war being played out by paper shogi pieces....