Gesshoku Kitan

High schooler Hoshino Terumichi has been haunted by a recurring dream: a young man, a century earlier, dying at the hands of another man he calls “Sensei.” This dream–or curse–is about to merge with reality when a mysterious, attractive classmate named Yamada Omihito steps into Terumichi's life (Seven Seas).

(Source: MangaUpdates)