It turns out that before Monta was tackled down, he reached his hand out and grabbed the grass on the "out of bounds area," stopping the clock and regaining those 4 seconds. Within those 4 seconds, Hiruma distracts the other team by causing an uproar in the audience. When it looks like Hiruma is getting the crowd worked up this sets him in motion and the ball is directly snapped to Sena. He runs it but gets covered by Agon. Sena then tosses the ball in the air and Hiruma catches it and scores by running it past Agon. The score is now 35 to 34. Touchdowns are worth 2 points now and kicks are worth one. With no chance to win in a tiebreaker, they must score a touchdown on the last play. Hiruma takes the ball and runs towards the Shinryuuji defense line. He throws the ball in the air and Sena catches it and scores a touchdown, which wins the game 35 to 36.
