Mere lookism is old hat, boob supremacy is the future! In a world where good looks was required in every profession, people started demanding boobs.

With breast expansions on the increase, a new ray of hope shone on the world as a man appeared who had the ability to cultivate breast growth by fully natural means, making surgery unnecessary.

The man's technique was called "breastcare," and it brought huge boobs to all the women of the world. As breastcare research advanced, numerous new "breastcarers" were born, and finally a school specializing in breastcare was founded.

The name of that school was "Otsuhai Academy." By coincidence, Muneyama Ikuru became a breastcare trainee at the Academy. He was resolved to massage all the breasts, and to perfect the art of breastcare.

However, from the very first day of breastcare, thanks to his little sister Mashiro's accidental slip of the tongue, the number of participants dwindled to almost nothing. At this rate, forget perfecting breastcare - he was in danger of flunking out altogether! Let the turbulent days of Muneyama Ikuru begin!

[Translated from the official website]