Garden, Park
You examine the mouth of a zombie and find a small garden in there. There are even benches... it looks like a park.
Zombies are dead, so I guess their mouths have all the things garden plants crave. Their mouths are like compost piles, if you think about it.
えん
その
None
You look closer at the garden and suddenly everything ends (えん).
Oh. The zombie probably bit down on your head and now it's the end for you. At least you were looking at a nice garden at the end of it all...