Makoto Naruse

Dr. Oki , the genius scientist who designed a new type of submarine is missing. His son, Susumu, smells an evil scheme of unknown group. He knows everything of his father's submarine called "Super 99" – equipment, weapons, functions and capacity. Susumu thinks that to find his father is to reveal the secret organization, Helmet Party, and stop their conspiracy. With the help of his friends and Marine Corps, he sets out to an underwater quest, not knowing how dangerous his endeavour is…

Prétear is the story of a girl, Himeno Awayuki, who must overcome her fears to become the White Prétear and protect the life essence on Earth called Leafe, with the help of the Leafe Knights, Hayate (wind), Sasame (sound), Kei (light), Go (fire), Mannen (ice), Hajime (water), and Shin (grass). In order for Himeno to fight off the Princess of Disaster and the demon larva, she must become one with one of the Leafe Knights in order for her to become Prétear. Will Himeno be confident enough in order to fulfill her destiny when the time comes?

Mikan Sakura is a normal 10-year-old girl. Optimistic, energetic, and overall a very sweet child, Mikan is the complete opposite of the aloof, intelligent, and somewhat cold-hearted, Hotaru Imai. Despite their glaring differences, the two girls have been best friends for a very long time. So when Hotaru suddenly transfers to Alice Academy, a prestigious school in the city, her best friend is devastated—especially when she hears of the horrible rumors regarding the academy's harsh treatment of students. Beset with worry, Mikan runs away to see her best friend! Upon her arrival, Mikan learns of "Alices," individuals gifted with various supernatural abilities, and that the school is an institution built by the government to train and protect them. Discovering that she has her own unique powers, Mikan enrolls in the academy, and, after a lot of trouble, finally reunites with Hotaru.

Kaname Chidori’s one of the most popular girls at her high school – unfortunately, it’s her growing popularity off campus she should be worrying about. Unbeknownst to Kaname, terrorists are plotting her abduction, believing she possesses the rare and coveted abilities of “the Whispered.” That’s where Sousuke Sagara enters the picture. He’s a hotshot soldier from the clandestine counter-terrorist organization known as Mithril – and he’s going undercover at Kaname’s school to try and keep her safe. He may be an ace in the cockpit of an Arm Slave mech, but there’s no training in the world that could prepare him for the warzone of high school.

A supernatural system allows people to take revenge by having other people sent to Hell via the services of a mysterious entity and her assistants who implement this system. Revenge, injustice, hatred, and the nature of human emotions are common themes throughout the series.