Good Morning Call

Yoshikawa Nao stays behind to live by herself when her parents leave to inherit her grandpa's farm in the country. On the day she moves into her new apartment, she discovers that it was also rented to Uehara Hisashi, a cute, super-cool, popular guy from her school. Not only did their housing agency unexpectedly close down, the landlord of the apartment told them that they had to pay more for their apartment than they had expected. With no money and no home to return to, Nao and Hisashi decide to live together as flatmates.
(Source: DramaWiki)
~~ Adapted from the manga series "Good Morning Call" (グッドモーニング・コール) by Yue Takasuka (高須賀由枝).