REPRESSION is a drug in the form of a pill developed by Dorothy of the Trinity. It was created to prevent Psyche Break, or PB.
When the mind is overwhelmed with stress, the user is to take one dose of REPRESSION. This erases the most recent memories of the user, removing stress. It is up to those who take it to decide whether forgetting is for the better or not. Because of partial memory loss caused, REPRESSION is not to be taken when alone for safety measures.
The Investigation Party figured out REPRESSION could help with the preservation of humanity by lowering suicide rates caused by stress.
REPRESSION-INJ is a liquid form of REPRESSION. It is to be injected directly into the user. Dorothy originally developed this variant of REPRESSION specifically for Akari, but she found it useful for cases where angels and people can't consume REPRESSION.