Reborn Forensic Doctor: Sir, Don't Bully Me!

The heroine has been reborn and has become younger, and her brain seems to have become younger. She cannot accept the relationship between siblings, but now it seems that the male is older and the younger is okay. The heroine seems to be only 15 years old after her rebirth. Shouldn't the heroine be in school at this age? It's nothing to follow the male protagonist to the scene. I didn't see the heroine's abilities, and there was something wrong with the case just based on my feelings. The scene of the case I saw earlier was so disgusting that it wasn't suitable to watch while eating.