Tonari no Seki-kunSéki, mon voisin de classe; My Neighbor Seki; Seki yang Duduk di Sebelahku; Мой сосед Сэки; เพื่อนเกรียนข้างโต๊ะ; となりの関くん; 上课小动作; El Pupitre de al Lado; 邻座同学是怪咖; Tonari no Seki-kun; 鄰座同學是怪咖; Jiranku Seki; Mein [Bank-]Nachbar Seki; Тонари но Сэки-кун; جاري سيكي; 上課小動作; 옆자리 세키군; Seki-kun, mi compañero de al lado; Yanımdaki Seki-kun; Pulpettinaapurit

From MangaHelpers: The boy who sits next to Yokoi in class, Seki-kun, is always up to something at his desk. He manages to somehow play very elaborate games without attracting the teacher's attention. From dominos, to shogi, to go, to mecha models, to playing with cats and more, he always has something new to do. Yokoi often finds herself getting reluctantly interested in his games, even though they always seem to end up getting HER in trouble with the teacher! [tethysdust]