Aishiteru

Set in Yokohama, this is a coming-of-age manga about a man's search for the woman of his dreams, from before his birth to the age of thirty. In the course of the 26-volume manga, the protagonist, Tetsuma Hoshino, enters a variety of worlds, including motorcycle races, battles with gangsters, and the challenge of boxing. It is also characterized by the use of lyrics from hit songs of the time throughout the story. (Source: Mangapedia, translated)