Hourglass of Summer is a oVA anime that premiered in spring 2004.

About the production: the story comes from a visual novel, there are 2 episodes of about 30 minutes and its current status is "finished".

Its main genres are comedy, drama, romance and sci-fi, with themes such as Time Manipulation.

On AniList, Hourglass of Summer has an average score of 60%, an average score, and appears on 2,368 users' lists.

Makimura Koutarou has made up his mind: during the summer vacation, he is going to confess his love to the seemingly unapproachable Serizawa Kaho. Yet, on the night before, he has a run-in with a strange girl - an encounter which propels him into the future. There, he learns that not only has Kaho-chan become his girlfriend, but she has also died in a tragic accident. Returning to his own time, Koutarou sets out to change the future and save his love. (Source: Anime News Network)

Official synopsis from AniList.