Kahogo no Kahoko is about a child-like university student who we never see study, who was raised by an overprotective mother played by Kuroki Hitomi and she basically spends the whole movie pulling cute faces.
First off this Kahogo no Kahoko is a comedy and its more of a shoujo anime style boy meets girl story mixed in with a family dorama.
Probably my favourite part of Kahogo no Kahoko is how idiosyncratic all the characters are. For example, Kuroki Hitomi completely changes into a different person when she leaves the kindom's border and you've a sloth grandfather who keeps saying he'll do something tomorrow. What saves Kahogo no Kahoko is the chemistry between the two leads which is pretty good and the main guy starts off not as a boring nice guy but as someone who takes advantage of Kahoko's naivety. Plus I like how he always turns up doing some dodgy part time work.
Kahoko, who is basically like an anime child never really learns what hardship is as the show turns into a family drama in the second half. The family stuff can get a bit draggy.
As a shoujo manga style jdorama about a kawaii girl who never grows up with a lot of family drama elements, Yukawa Kazuhiko (GTO, Koi ga Shitai, Oyaji) does a pretty good job. He's an expert at the family drama stuff with the classic Oyaji. So if you accept the parameters or limitations of the genre, he did a pretty good job and I managed to get right to the end and the bus stop scene was moving. Surprisingly watchable.