To Heart(1999)

ToHeart

For as long as Akari can remember, she and Hiroyuki have always been friends. But with time, everything changes, and her feelings have turned into something more. As a new semester of high school begins, will the two childhood friends come closer together or drift further apart? Join Hiroyuki, Akari and all their friends - the bubbly Shiho, the quiet Serika, the lovely Kotone, and more - in this heartwarming tale of love, relationships and friendship!

(Source: RightStuf)