Highschool of the DEAD And Aliens!

Jack thought the only problems he would have to deal with in the Zombie Apocalypse would be zombies and his feelings for Saeko Busujima. However, it turns out that his past has returned to kill him, his group of friends, and the rest of life on earth. Can Jack and his friends survive this Zombie and now Alien infested world...? (Rated M for language, gore, and possible situations)