Tonari no Seki-kun OVA

Rumi Yokoi is trying to follow the lesson when Seki pours sand onto his desk and begins removing it from beneath a tiny flag. His increasingly delicate construction turns a simple game into a spectacle she cannot stop watching, even with a teacher at the front of the room.

On another occasion, he produces two cats and keeps their attention entirely to himself. Rumi's efforts to tempt them over only draw her further away from her schoolwork. Whether she fears ruining his project or desperately wants a turn, sitting beside Seki makes concentration an uphill battle.