There are no canonically trans characters, but there are predatory men who dress as women and lure men off to suck their energy out & steal from them. Could be uncomfortable for some readers.
Though there is no instance of gaslighting specifically, the protagonist represses memories due to trauma and remembers portions of his childhood incorrectly due to being told incorrect information.
There are jokes made disparaging the protagonist's attractiveness, which later ends up being revealed to be because of an ability he has that distorts his appearance.
The protagonist's late father is mentioned to have been alcoholic but is only brought up in passing. There are no scenes directly showing a character abusing alcohol, though there are a few of characters drinking and/or getting drunk.
Insects are killed during multiple scenarios that require individuals to kill other creatures. Additionally, monsters that take animal-like shapes are killed throughout the scenarios.
The protagonist is restrained by his loved ones a few times later in the novel to prevent him from joining the fight due to his self sacrificial tendencies
One of the leading female characters (Jung Heewon) experienced past sexual assault, and other female characters are seen being led away, coerced into sex. There is also a scene where a sexual assault is briefly described and several obscene comments are made towards the victims.
Fairly late in the novel, the main character is forced against his will to turn into a large Outer God. This transformation is stopped by assistance from his friends but the process is somewhat drawn out over a chapter
Teenager Kim Namwoon dies early in the novel, and a young girl is threatened later on. It is implied that children and teenagers have died in many of the deuteragonist's regressions.
The protagonist dies on several occasions but is able to revive himself. There are still portrayals of grief throughout the novel however due to other characters being unaware he is still alive.
Undead characters are present, but there are no hauntings in the traditional sense. One character makes a brief appearance as a ghost, only audible and not visible.
The protagonist has an ability that allows him to occupy another person's body under specific conditions. He can generally only puppet someone else's body with their consent; only one major instance has him controlling someone else's body without consent, since they were unconscious.
The protagonist is often injured and placed in hospitals, particularly towards the end of the novel as society recovers. Also, a supporting cast member is a doctor and frequently administers medical attention to others, later setting up her own hospital.
The protagonist (who has a resurrection ability) frequently dies intentionally and allows himself to be hurt in the place of his companions. He has attempted suicide in the past, and he once attempts to kill his alternate self.
At a few points in the novel, the protagonist or one of the other main characters tries to incite violence in an effort to get others to kill them, either temporarily or permanently. None of these efforts succeed.
The relationship between stories and the reader is a common theme in the novel, and the protagonist regularly makes self-aware comments about the nature of being in a story.
The deuteragonist is mentioned to have had a child at some point in the past. A minor character gives birth offscreen. The protagonist raises a non-human child from an egg.
At one point, multiple nameless characters, described as middle aged men, are disguised as young women and engage in predatory behavior. The narration at this point seems to consider them to be a joke.
Jang Hayoung is a female character with an androgynous appearance; the protagonist assumes that she is male and addresses her as such for a long time before being corrected.
No one drowns, but the protagonist falls into a river and is eaten by a sea monster at one point, and has some difficulty reaching a place he can breathe.