Our Everlasting (2000)

Surfer dude Hoyru confesses his love for the timid, shy pretty boy Shounin. But what Hoyru doesn’t know is that Shounin has had his heart broken before and is scared of it getting broken again. His feelings are pure but he must show that to Shounin for their love to bloom. And when a Shounin’s gay French tutor comes into the picture doubts surface about Horyu’s sexual preference and their relationship is put to the test.

Source: www.anisearch.com/manga/4017