Slow Life in Another World (I Wish!) Vol. 9 (manga)

PLANTS VS. ZOMBIESThe underground auction is over, and Itsuki and his friends have lost out on both Miracle Drugs. Everyone's spirits have hit rock bottom, especially Hayato's.

Unable to bear the sight of his fellow countryman so dejected, Itsuki decides it's time to take matters into his own hands and create a Miracle Drug himself! His first step? Finding the rare ingredients he needs for such a valuable elixir. Luckily his new friend, Saint Theresa, agrees to grant Itsuki access to the church's private medicinal herb farm. Yet when he arrives, the entire place is overrun with the undead!