IT'S ALWAYS BROS«» OVER HOES

Phantom High manhwa Don't let them find out you're human! Ingan Kim, a normal human man, suffers an unfortunate fate of having to work as a teacher in Hell's Phantom High, where spirits and monsters are students. His only chance at survival is an elixir he uses to hide his human scent. If his students ever find out that he is human, he will be done for. Everyday, he asks himself: will I be able to keep my human scent hidden from these students who will eat me up?
+

Lin Bo and Zheng Xiaotao have always been secretly attracted to each other, but because they don't know of each other's feelings, they're too embarrassed to confess. Helpless, they each turn to their own sisters. Lin Bo's little sister is a great god-like BL writer, while Zheng Xiaotao's elder sister is a great god-like BL novel reader. The two girls, priding themselves on their perfect qualifications, supply the two with a wealth of ideas. A light-hearted romantic comedy thus begins...