pastel - something to read.

Basic plot from Anime news network:

Tadano Mugi, a high-school student, falls in love with a girl, Tsukiyaki Yuu. When Yuu's father passes away, she and her sister are invited to move into Mugi's house by Mugi's father. Mugi and Yuu must then cope with the new challenges caused by living together and the growing relationship between them, as Yuu adapts to a new environment and Mugi struggles not to confess his feelings out of consideration for her situation.

http://homepage.hispeed.ch/aFFi/pastel.html