I love these "oldie" mangas, because their stories usually read at a steady pace, and the characters aren't too overdone. This particular manga is no exception.
I usually do prefer, however, the cleaner-looking "modern" manga art, but we must take into consideration the art style during the time this manga was drawn. With that in mind, I must say this is perhaps an 8/10--pleasing, but not wowing. The frames flow smoothly and the flashbacks are nicely blended in so that there is no confusion in the story.
This particular plot is quite common, but what makes me give Tokyo no Casanova a 10/10 is how the story is executed. Despite that Akira's mom is a big star and that he is a player himself, he isn't overbearingly flashy. The entire story has a very homely feel to it that is practically nonexistent in the typical shoujo fluff mangas nowadays, where the male lead is practically inhuman. In Tokyo no Casanova, however, Akira, as well as much of the cast of characters, are HUMAN. And that, my friends, is a big plus and a refreshing change.