It Begins and Ends with Death (and inbetween, we found love)

at eighteen, yuta knows his worst fear is not being able to protect jaemin, and he guesses that it's the only rational fear he's had. with his parents dead and the world falling apart, jaemin is literally what he lives for. lives for the boys laugh and smile, lives for his questions and his innocence. yuta lives so jaemin can, too, so jaemin can grow up into a hopefully much brighter future.

which is why yuta, not at all gracefully, uses a crusty frying pan to slam the oncoming zombie in the face.