Meet Sawaki Tadayasu, the second son of yeast preparation suppliers, who is forced to go to an agricultural university and continue the family business. He has the unique ability to see microbes. He and his friend, Kei, are taken in as students by the fermentation-process obsessed Itsuki-sensei. This manga follows Sawaki as he tries to make his way through university as discreetly as possible...which is almost impossible if you're as unique as he is.