Megatokyo Vol 2

Megatokyo by Fred Gallagher. A Comedy manga rated Teen, published in English by Dark Horse.

Gamer friends Piro and Largo take an impulsive trip to Tokyo and quickly find themselves broke and stranded. Piro is shy and lovesick, Largo is convinced he must defend the city from zombies, and Tokyo is about to get a lot stranger for both of them.