Responses
Sounds a bit like this to me but idk, might be wrong.
http://www.mangago.me/read-manga/faster_than_a_kiss/
I've read Faster than a kiss too, but this mysterious manga didn't have a cute little brother, lol
Thank you very much for the help though ヾ(❀╹◡╹)ﾉ~
I've been trying to find this manga I'd read a bit of a few years back, but all I can remember is that the fl was a high school student who ended up homeless, and the ml picked her up and brought her home as his housekeeper. He might have been her teacher, but I think he also had a secret personality. If anyone has an idea of what manga this could be, it'd be greatly appreciated (⌒▽⌒)