Tokyo Kareshi

From Chibi Manga:
"Yu-chan I’ve been wanting to see you this whole time, I’m presently going to Tokyo..."
Mugiko is a very energetic girl that was raised in a rural agricultural village within the mountain area. In order for her to see Yu-chan, who she was extremely close with when they were children, she transfers to a school in Tokyo. It has been three years since Mugiko has seen Yu-chan, but when they meet each other again he treats her coldly. Mugiko is shocked by this, but a very kind prince type boy appears…?!

Also includes the following:

Countryside Girlfriend
A continuation of Toukyou Kareshi told from Reigi's point of view.

Tatami 4.5 Mats Lovers
Ume indirectly saves a guy from being beaten. The guy turns out to be Ninomiya Hikaru, a rich guy who later transfers to her school. He tries to get Ume to fall in love with him, but Ume wants nothing to do with him.