The protagonist Kirino Yuuto, It is surrounded by childhood friend sisters who lives next door and to real sisters who are cute beautiful woman, it lived in hell named the harem state. It is such pretty, Beautiful girls, My heaven that becomes loved dearly and is ardently. However hell of not putting out the hand to it. In this situation do not seem to be able to send honest student life...

Yuuto which spends days of the agony while it is troubled by the color and scent of the woman formation. Summer vacation starts just the life of hardship started finally becoming hard, a certain day. It came to abrupt. -- In the courier service.

[It is me, Angel apprenticeship. Seyakara elder brother, Cooperation want for a moment. Elder Brother - Love Love of power - i want you to squeeze gyu hard.]

What on earth? This fellow is the reason that what to be said...? Soon be shocked, Yuuto and sisters who have been rolled up in love power collection at the risk of life.

You can not... true love is waiting on the other side of the mess, or did not have?