Later at lunch time, the gang was getting ready for their next game: Zombie Tag.
Mion had already laid down the rules. They would draw straws to determine who was 'it'. Shortest straw would be the zombie. Then they would have to avoid being tagged by the zombie on school grounds until lunch time ended. Being tagged meant being added to the zombie's ranks, and you would have more and more coming after you. Whoever was still 'human' when lunch ended would be the winners - unless everyone had become zombies, in which case the original zombie would be the winner.
Mion held a bunch of straws in her hand for everyone to take.
Heh, Kei-chan doesn't know that all the straws in my hand are short straws, and everyone has a long straw set up in advance. And of course, we know the school grounds better than he does, and we have Satoko's traps on our side.