矢口春雄(通称ハルオ)は、勉強も運動も不得意だがゲームには人並みならぬ情熱と努力を見せる小学6年生。今日もゲーセンの対戦筐体で次々と相手を倒していく。そんな彼の聖域(サンクチュアリ)に現れたのは同じクラスの大野晶。家は裕福で本人も成績優秀の美少女で、しかもハルオをもしのぐ腕前! 操作難易度の高いキャラクターも壊れまくった劣悪な筐体も従わせる彼女にハルオは激しく感情を揺さぶられる。これが二人を結ぶ因縁の始まりだった……。 Haruo Yaguchi is the 6th grade boy who has unordinary passion and energy for game unlike his poorness of study and sports. Almost every day he goes to game center, his sanctuary, to fight with other players. One day, Haruo finds one of his classmate Akira Ono. Grown up in the wealthy family, Akira is not only a beautiful girl but also a top performer in school. On top of that, her game skill actually is better than Haruo. She easily controls challenging characters and broken game body, which shocks Haruo’s emotion. This is the fateful encounter for both of Haruo and Ono.