My Girlfriend is a Zombie

The apocalypse has arrived, and the entire world is plunged into darkness and chaos. As an otaku, Ling Mo feels a great deal of pressure. His childhood sweetheart is infected with the virus, the beautiful senior sister is bitten by evil zombies, and now there's a zombie girl at home - can this life even go on? Drinking the girl's saliva can provide immunity to the virus? Having "relations" with the zombie girl can actually enhance physical fitness? Ling Mo says: Actually, having a few zombie girlfriends isn't too bad... Wait, can you please stop biting me?