My guess yifu (the neighbor) was the missing kid from the family who had been massacre, most likely he killed his own family just because he is that kind a nonchalant psychopath genius, since he said "relationship that isn't beneficial is not necessary, i want to slash them all"
My guess yifu (the neighbor) was the missing kid from the family who had been massacre, most likely he killed his own family just because he is that kind a nonchalant psychopath genius, since he said
"relationship that isn't beneficial is not necessary, i want to slash them all"