This is the most charming gag comedy. There's all the needed ingredients for a solid comedy series. Vibrant characters, sufficient range of personalities with good chemistry, personable humor, fun art-style, the right amount of progression to keep things fresh, and even some heartwarming moments. It's mostly just goofballs with a childish sense of humor being childish goofballs, one gag every single page. And it's the most wholesome juvenile manga there is. It's not an amazing series by any stretch. The art isn't the most expressive and sometimes gets hard to read. The gags aren't special at all, and sometimes too culturally referential. It has very little to say and doesmostly one thing in different ways (not that the gags would be stale or unvaried, it just has a recognizable formula and pulls it off right).
But the enjoyment in it is exactly what a good sitcom should be: a short relaxing time with characters you get to know and love. And it's extremely effective in that. The more the cast expands and gets to know each other, the more you start to care to see them goof off. Just like the character Kuraki watches the siblings be idiots to cheer up, it becomes a joy after a hard time that allows you to kick back and unwind with these dumb jokes.

If you want something quick and light, this series is a great staple for daily reading. It also updates often, is free online, has good English translators, and hundreds of chapters out.