Sukinandakedo

From MangaUpdates:
With nervousness, Iijima Tadahito decided to confess to his close friend Nagano Naoki. To his bliss, Nagano agreed to go out with him. But when he realizes that their dating life doesn’t differ much from the normal friendship they had before, and Nagano’s expressionless face also stays unchanging, Iijima gets all the more distressed…
The book also contains several oneshots.