A common cop-out in anime, manga and soap operas, when a series is based on Brother-Sister Incest, is to reveal towards the end, or explicitly state in the opening monologue, that they're Not Blood Siblings. Usually, for all intents and purposes, everyone acts like they are. Alternatively, it can be used to explain why everyone's okay with the relationship. This can also be foreshadowing for such a relationship, as many shows usually wouldn't make a big deal about adopted children unless there was a Changeling Fantasy involved. Examples of Not Blood Siblings include: