養護教諭として働いていた主人公は、生死を彷徨うほどの事故から生還したことを切っ掛けに人の身体を巡る『気』を操る力を得た。
特に性欲や性感に直結する『淫の気』の扱いに長け、その力を利用して勤め先の学園で女子学生の身体を弄んでいた。
しかし、その悪事も長くは続かずにトラブルを起こしてしまい、別の学園へと追放されてしまう。
新たな勤め先である条帝学園では失敗を繰り返さないよう淫の気の使用を最低限に留めつつ細々と楽しんでいたが、
ある日、『今学期中に学園から出ていかないと過去を公表する』という脅迫状を受け取る。
その差出人が、普段から自分に厳しい態度を取る少女、「周防 美由里」ではないかと怪しんだ主人公は
彼女と対峙してその疑惑を深め、これまで抑えていた淫の気の餌食にしてしまう。
淫の気により性感を限界以上に引き上げられ、狂乱するほどの快楽絶頂を味わわせながら美由里の処女を奪ったものの、
彼女は脅迫状の差出人ではなく当てが外れる。
しかし彼女を凌虐したことで吹っ切れ、能力を全開で使用することの楽しさを思い出した主人公は、
先行きの見えない差出人探しよりも、目を付けていた女子学生に淫の気を使って楽しむことに注力することに決め、
残された時間を欲望の赴くままに過ごすべく行動を開始するのだった。
The protagonist, who worked as a school nurse, gained the power to manipulate the "ki" that flows through the human body after surviving an accident that left her in a life-or-death situation.
He is particularly skilled at manipulating the "erotic ki" that is directly linked to sexual desire and sexual sensation, and uses this power to play with the bodies of female students at the school where he works.
However, his misdeeds did not last long, as he got into trouble and was expelled to another school.
At his new workplace, Jotei Academy, he kept his use of erotic ki to a minimum to avoid repeating his failure, and enjoyed himself,
but one day he received a threatening letter that said, "If you do not leave the school by the end of the semester, your past will be made public."
The protagonist suspects that the sender is Suou Miyuri, a girl who is usually strict with him,
and confronts her, deepening his suspicions, making her a victim of the erotic ki that he had been suppressing.
His lustful aura raises his sexual arousal beyond its limits, bringing her to a frenzied climax as he takes Miyuri's virginity,
but she turns out not to be the sender of the threatening letter, and his plan goes awry.
However, having abused her, the protagonist is able to let go and remember the joy of using his powers to the fullest,
and decides to focus on using his lustful aura on a female student he has his eye on,
rather than searching for the sender with no clear future, and begins to take action to spend the time he has left as his desires dictate.
