As the title says, I need help finding the name of two anime.
I'll try to be as specific as possible, so here it is. I think someone showed me a clip about it one or two years ago. It was about a guy whose grandpa had just died. For some reason his grandpa wrote in his will that he wanted his grandson to attend an all-girls school. The guy looked very feminine so it wasn't that hard for him to fit in, but he was having trouble adapting to the situation.
This other one was from a really long time ago, I think I was like 10 or so. Basically it was about a little boy who was like a caveman person. He had green hair and he lived with this girl and her father/grandpa who was a scientist. I believe he used to take down giant monsters, but I'm not too sure. I do remember that the opening song had something to do with them dancing a caveman-like song.