Bound to My Zombie Girlfriend

Apocalypse arrived, humanity turned into zombies. I awaken the Love System. I like female zombie Cheryl, set a trap to bind her. Completing 'hold hands' mission unlocks rewards: raw meat, Zombie Virus Vaccine, Gene Evolution Serum. Temptation of raw meat makes me determined to win her over. While feeding her, the newlywed couple from my past life begs for food. I refuse, plotting to use them. Zombie's mind focuses on eating. Increasing cross-species favorability is the biggest challenge.