Although the protagonist is referred to as "him" at the beginning, her gender is female. Because her family has calculated that she will face a big disaster before she becomes an adult, and God doesn't care about the fate of men, so she uses the identity of a man until she becomes an adult.
There is a firm friendship between the protagonist and the five or four members of Glass Summer. It focuses on daily life and will not change any endings.
Mission: Knowledge changes life