From YaoiOtaku:

A story about an excellent and manly salaryman, whose beauty is extraordinary ? the senpai Kitagawa-san and his, although dumb, but very handsome kohai, Nakamura-kun. In the middle of night with a bottle of sake, a very girlish confession of the sort "Oh là-là, it?s hentai!", is to hover over the poor kohai Nakamura-kun. Backed up with his very own fantasies and undeniable desires, he jumps his sempai Kitagawa-san.., unexpectedly though Kitagawa-san doesn?t have anything against it!! Two young boys, two love birds start the beginning of their love story! The very awaited book ? written especially for you!