Taki Takenosuke's Walking Time is very short, and not a lot happens in it. You can read the entire manga in about an hour.
And yet, it's such a relaxing, charming story that I can't help but love it.
We follow Taki Takanosuke, an elderly gentleman who enjoys taking leisurely strolls around town. On his walks, he meets with various people, learning about them and just spending time with them. There's such a genuine warmth and friendliness to these interactions, and it makes me hope that I myself can be such a friendly old man someday.
We learn a bit about Taki's past as well, and it really helps round him out as a character. By the end of the series, I really liked this delightful old man.
For a mere 21-chapter story, the manga makes good use of its limited time, and tells a compelling story with likable characters.
If you want a good short-but-sweet manga, give this one a read.