A dog dies in "The Licking Woman", a bonus story that was included with the Japanese release of the manga. The story has no connection to the plot of the manga itself and was not included with the English release.
A character's face gets mutilated in a way that makes one of her eyes look like it's about to pop out, but a medical intervention prevents anything from happening to it, and her eye is shown to be fine afterwards.
A man gaslights a woman into believing that she is unreasonable and that he is acting in her best interests, which is not true. He also attempts to manipulate said woman into believing that a person she knows is alive, despite evidence to the contrary.
No one is drugged against their will, but characters voluntarily take sleeping pills as means of suicide, and drugs are implied to have been used during medical procedures.
No PTSD explicitly shown, but a character is depicted as stressed while listening to a news coverage on TV that's related to a traumatic event she had witnessed.
A character believes that her reflection in the mirror is talking to her and urging her to die, which appears to be a result of body image issues due to skin condition.
A character forcibly kisses another character on the mouth. This also happens in a bonus story not included with the English release, but the second example is non-sexual in nature.
A woman experiences memories of another person's past lives, but is unconscious when it happens. A robot is implied to be possessed by a deceased human's spirit.
A character becomes unconscious after overdosing on sleeping pills and having a near-death experience. Another character slips in and out of consciousness due to her deteriorating mental state.