The anime begins with two brothers, Naoto and Naoya Kirihara, who were born with psychic powers. They couldn't fit in with normal people because they couldn't control their powers well, especially when they overwhelmed by their abilities due to being so young. Their parents couldn't take the stress of caring for such abnormal children anymore, so they drugged the boys and handed them over to a mysterious laboratory to be cared for and watched over.
After causing a scene at the facility out of anger, Naoto recalls his mother's words and realizes that he and his younger brother only have each other, so he vows to stay by Naoya's side and be his protector forever. Fast forward 15 years later: when the director of the laboratory dies, the invisible barrier surrounding the building disappears, so now Naoto and Naoya are free to escape and experience the "normal' world as adults.
The anime is an adaptation of a 1992 Japanese live-action drama called Night Head. The series also has a 2 volume manga adaptation.
The Night Head franchise received a reboot anime, Night Head 2041, which aired on July 14, 2021.
This anime provides examples of:
- Big Brother Instinct: Naoto is very protective of his meek younger brother, Naoya and vows never to leave his side as they are all they have got in this world.
- The Empath: Naoya is so in tune with his ability to feel emotions that negative emotions coming from a large group of people gives severe Sensory Overload to the point he becomes catatonic
- A Mind Is a Terrible Thing to Read: Naoya is so in tune with his ability to feel emotions that negative emotions coming from a large group of people give him severe Sensory Overload to the point where he becomes catatonic.
- Psychic Children: Psychic abilities appear to manifest at birth. The brothers had trouble fitting in with other children as Naoya gets easily overwhelmed with being to hear everyone's thoughts (via touching people and objects). Naota is more in control of his powers due to being older but he loses his temper quickly and has a penchant for shattering windows and roughing people up with his powers when upset.
- Psychic Nosebleed: Naoto gets a nose-bleed in class after being overwhelmed with his powers.
- Psychometry: Naoya can see the memories of objects he touches. That's how he knew that the drinks that their parents gave him and Naoto were drugged.
- Tampering with Food and Drink: Naoto and Naoya's parents drugged their melon sodas to subdue the boys so they could give them away to the laboratory.
- Telepathy: Naoto has the ability of telepathy which he uses to talk to Naoya in secret.