These two dramas are seemingly quite different, but I think they have some themes in common, such as people working through various life issues and the characters trying to help each other through it. There's a theme of family here, in Kahogo no Kahako they are related by blood, but in Last Friends, the friends are like family. Last Friends is quite a bit darker in terms of the issues the characters deal with, but if you liked Kahogo no Kahoko, give Last Friends a try!
Even with different synopsis the emotional substructure of both dramas are same. I am assuming you have already watched 35sai no shoujo, therefore i will explain about the drama i am recommending, kahago no kahako tells a story about overprotected girl who might look adult but actually is very naïve and pampered by her overbearing mother.(similar to mother of 35sai no shoujo) She don't know the true functioning of society and assumes that everything is ideally happy. An encounter with struggling yet hardworking painter changes her believes tho ~. Male lead of both dramas are very similar! They show the bitter truth to our female leads and support them lovingly. Despite being a grown up , both of our leads mature with increasing episodes. Like nazomi , kahako will pass different levels of maturity and will lead to a happy family :)
