Tonari no Seki-kun

The Tonari no Seki-kun watch order opens with the original OVA, moves through all 21 episodes, and closes with a set of specials, the full correct sequence in one place. Because the episodes are short, gag-driven vignettes about Yokoi watching Seki's increasingly elaborate desk antics, there is no ongoing plot to spoil, so the exact order matters less than usual, but the sequence above is the recommended chronological way through. New viewers can comfortably start with the Tonari no Seki-kun OVA to get a feel for the format, then continue into Episode 1. The specials at the end collect additional shorts and work as a bonus once you have finished the main run. Everything here is quick to watch, and this list gathers the OVA, the full 21-episode block, and the specials together so you know exactly where to begin and what to watch next, including all the extras.