To Heart
English title: To Heart
Japanese title: トゥハート
Type: TV
Episodes: 13
Premiered: spring 1999
Source: Visual novel
Genres: Drama, Romance
Studios: OLM
Producers: KSS
Duration: 24 min per ep
Rating: PG-13 - Teens 13 or older

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)