Unfortunately, you're unlikely to ever see anime like that. With manga, there are many series with older or elderly protagonists. The variety in manga is insane, and it's one of the reasons I gravitate far more towards manga than anime. A lot of this stuff doesn't get translated, but there are some really beautiful slice of life series out there.
Tasogare Ryuuseigun is a pretty well-regarded classic, and it's all about people later in life falling in love... and it has 61 volumes so far. It's great. Not exactly the same, but you can find manga that scratch that same wholesome itch as the commercial.