In rugby, there is no ace striker, there is no number four batter, so who is the star of the team? The story begins at school entrance ceremony of Kanagawa High School where Kenji Gion, a small but gutsy go-getter joins the rugby club. He joins with his classmate, Iwashimizu, who has a complicated past and sub-captain Hachiouji, who always takes good care of his Club members. Lastly, there is Captain Sekizan, who has overwhelming powers but keeps his cards close to his chest. With such differences in both personality and physical performance, the team must learn to work and grow together so they can become the best.
Keitaro and his childhood sweetheart make a promise to be accepted at and to meet each other at the prestigous Toudai University before she moved out of his life. About a decade later, Keitaro has become an artist and a daydreamer, having ranked 27th from the last in the national practice exam. When his grandmother leaves the all-girls dormitory, he becomes the residential manager and soon meets up with two Todai applicants who may have been that sweetheart, since he's forgotten her name. Then there the other tenants like young Shinobu who was in despair until Keitaro helped her, Motoko the swordsmaster who sees men as evil distractions, Su Kaolo the genius child inventor and the sneaky Kitsune.
At war with the adjacent Kioka Republic, the Katjvarna Empire. In that region, due to certain circumstances, there was a certain youth unwillingly preparing to take the High Grade Military Officer Exam. His name, Ikta. Disliker of war, lazy, admirer of women. No one predicted that that kind of Ikta would later on become a soldier referred to even as a great commander... He who survived a world embroiled in war with his superior genius, Ikta. Illustrating his dynamic, dramatic life, a splendid fantasy military history, the curtain is raised at last!
Karin, a DNA operator from the future, is on a mission to change the course of History by stopping Junta Momonari from becoming the Mega-Playboy who fathered 100 children and led to the overpopulation of the world. But Junta is no playboy; in fact he is allergic to girls. But when Karin shoots him with the wrong DNA-altering bullet, he starts sporadically becoming the Mega-Playboy capable of charming any woman. Karin must try to restore the situation to normal before the change to Mega-Playboy becomes irreversible.
When William Twining breaks into his bankrupt family's vaults seeking funds for his tuition, he discovers that he's supposed to choose the interim ruler of Hell!
Fuutarou Uesugi is a poor, antisocial ace student who one day meets the rich transfer student Itsuki Nakano. They argue but when Uesugi realizes he is to be her tutor, he tries to get on better terms. While trying to do so he meets four other girls.