Mummies aren't as scary as they look in horror films. They don't kill people. They're cute. They're not very good at walking and sometimes they'll fall over with a little plop sound. They might start crying if they don't know where you are. They eat dog food and run away from mice. They're a bit pathetic, really. Oh, and they're hamster-sized.
HOW CAN I ACQUIRE ONE!? Glad you asked! Just get your explorer father to send one back from Egypt, as a change from sending you supernatural things that genuinely are dangerous.
This show's lovable. Our hero, Sora, acquires the world's most huggable mummy. They love each other. His friends, Tazuki, Motegi and Daichi, will end up acquiring a baby oni, a baby dragon and something that looks like the child of a guinea pig and a rugby ball. (It can move at the speed of sound.) It's a bit like becoming a parent and a bit like keeping pets. The monsters play together. They can't talk, but they seem to understand simple Japanese and in some cases can even write.
It's a gentle show. Mostly it's just showing us what it's like to be the adoptive parent of tiny monsters, which is so endearing that to be honest I could have watched episodes like that for ever. However there's also some deeper material, with each monster-owner having personal issues that being in these odd little relationships will force them to address. This is nice too. The chunkiest by far is Tazuki's semi-tsundere issues. There's even a baddie in the last episode (a collector who just sees monsters as a way to make money), but that's just obligatory season finale drama rather than something the show's focusing on. It works quite well, though.
This isn't the kind of show one needs to dissect. It's just warm and snuggly. It's the thing to watch if you want some anime to cuddle. You could hypothesise about possible romances one day among the human cast, but that's all you'd be doing. The show's not going there. Besides, they're all so lovely that you'd be happy to see pretty much any two of them paired up and you'd be pretty confident that they'd go well together. I like this supernatural world. I love Mii-kun and his (?) friends. It's an animated warm fuzzy.