I should make sure to include key characters like the protagonist, his companions, and the female leads. For example, in a harem setup, there's often a main love interest, a tsundere, a shy one, etc. The zombie apocalypse setting might involve them working together to survive while navigating romantic tensions.
I need to include elements common in harem manga: romantic subplots, rivalries, and group dynamics. Since it's a zombie world, there should be elements of survival, battles, and perhaps the use of powers or strategies to combat zombies. Also, since it's Welovemanga, a popular site for manga translations, I should mention where it's available and note if it's a raw scan or verified translation.
Need to be careful with names and ensure consistency. If there are known characters from previous chapters, reference them appropriately. If new characters are introduced, describe their traits briefly. Highlight any action scenes if they’re relevant to the plot progression.
Finally, wrap it up with a conclusion that talks about the potential impact of Chapter 12 on future developments in the series. Maybe hint at upcoming chapters or leave the reader wanting more. Make sure to advise readers to visit Welovemanga for the verified scans since the user is interested in raw manga from that site.