長い休みが終わり、学園の新学期が始まった主人公。
登校するそのそばには、なぜかレヴィオラとミリスがいました。
優ちゃんが心配だから、お姉ちゃんたちが付いて行ってあげる♪
二人はなんと、学生と校医として主人公の学園に通うことを決めたのです。
するともちろん――登校できたからエラい！
1時間目を受けれてエラい！ 昼休みまで授業を受けれてエラい！
などなど……理由をつけて主人公にエッチなご褒美を繰り返す始末。
主人公と悪魔なお姉ちゃんたちのエッチすぎる学園生活が始まります。
The long holidays are over, and the new school term has begun.
For some reason, Leviola and Millis are beside the protagonist as he walks to school.
The older sisters are worried about Yu-chan, so they'll accompany him♪
The two of them have decided to attend the protagonist's school as a student and school doctor.
And of course--you can attend school, that's great!
You can attend first period, that's great!
You can attend classes until lunchtime, that's great!
And so on and so forth… They keep giving the protagonist naughty rewards for every reason.
Then begins the protagonist's overly naughty school life with his devilish older sisters.
