From Toothpaste Scanlations:
Sakura always believe she would meet the mysterious guy again, whom she fell in love with eight years ago. But she only knows two things about him, which are that his name starts with the letter "K" and he has already left this city. One day, two transfer students... Kurokawa Sei and Azuma, who used to live here eight years ago, suddenly appeared. Not only that but they're twins as well?!