The game centers around different warlords from Japan's Warring States (Sengoku) period, who are all involved with the player character. The game is described as a "Warring States romance fantasy." (Source: ANN)
The story revolves around Nekoyama Suzu, a timid, shy tsundere girl loves dogs, and Inugami Yachiyo, a super masochistic, air-headed, friendly girl who loves cats. One day, after a fateful meeting, the two find themselves attracted to each other. In response to Inugami's instinctive approaches, Nekoyama is always bashful. Their friend Aki has to work hard to make jabs at some of the situations of the two, and also to stop Inugami from going berserk.
The main character, Yuuta, is supposed to be the viewer's younger brother who goes off to study abroad on a small island in the Atlantic that can not be found on any map. The school he enters is called St. Alphonse Academy. The boys who study here are all "marginal princes" which appears to mean Princes of remote, frontier or border regions.
Lu Shuiyin (Riku Suigin in Japanese) is a master of gaming, a skill only known to his classmate Lu Lian (Riku Lin in Japanese). One day, Shuiyin receives a device from Lu Lian for a tomb raiding online game. While Shuiyin is excited to receive the device, Lian is suddenly kidnapped. Shuiyin touches the device that was left behind, pulling him inside the game and trapping him there. What is the imaginary world inside the device? What will Shuiyin find there? It is a world where two groups of people fight over the power of the gods, which originates from the tomb the mother goddess Pangu (Bango in Japanese). The two groups are the tomb raiders and the tomb protectors. The device Shuiyin received from Lian is called the Monolith, and it allows a normal gamer to go near the tomb. The tomb raiding group plans its attack by recruiting common people in the name of gaming. Shuiyin, as the final tomb protector, must fight against the raiders in order to save Lian.
High-schooler Morina Nanase has begun working as a part-timer in an Italian restaurant, Trattoria Festa. As she encounters various quirky co-workers, such as their manager, the child prodigy chef Maro Kitahara, and unique cuisines, she begins to grow as a person.
A 300-year-old book is discovered which chronicles the adventures of the legendary Samurai Troopers... centuries before they happen! But what does this mean? Are the Troopers merely puppets in some cosmic play, acting out parts? Who is this mysterious Suzunagi, a mysterious girl who entices each of the warriors with their hearts' desire - salvation, new armors, freedom from a life of fighting. Why is she so interested in the troopers and their armors?
Goro Kumagaya is an established, tall middle-school goalkeeper who wanted to enter Yokonan high-school that is considered to be among the elites in terms of its football club, only to fail and end up in the lowly-ranked school opposite to Yokonan because of an accident. However, he met Shingo, Hideki and Kazuhito Oda who are all skillful footballers there and together in the Kawasaki High School football club, they challenge Yokonan and any other schools that they have to face in order to improve and become the champions. Any setbacks that they face would instead be an opportunity for a better improvement; one of which was the discovery of Goro's natural talent as an ace striker.
Hero was a high schooler living an ordinary life.
One day, he meets a very strong and intelligent mechanical arm named "Mecha-ude". After a strange turn of events, the "Mecha-ude" started living inside Hero's hoodie and the two's life full of trouble begins.
As the boy and his "Mecha-ude" fights together and strengthen their bonds, the two also meets new friends who also fights along with each of their own unique "Mecha-ude" partners.
Out of those, one of the heroine has two "Mecha-ude" which appears out of her skirt. An active girl with a totally opposite characteristics from hero himself, he gradually becomes attracted to her.
But the two are confronted with other "Mecha-ude" users who are in search of the secret of "Mecha-ude" relentlessly.