春綴る、桜咲くこの部屋で (Haru Tsuzuru, Sakura Saku Kono Heya de)

Plot

On the day she enters university, Haruki has a fateful encounter with Sakura in the classroom. Attracted to each other and lived together even after graduation, the two suddenly parted ways and Sakura disappeared from this world. Five years since then has passed, and it's the season when cherry blossoms bloom for the fifth time. Haruki, still in despair, accidentally discovers a diary. It was an incomplete diary written by Sakura...