Kyouai teki Unmei ron

The main character, Aiki, still has memories of his lover from a previous life, and he hopes to be reunited with her again. One day, Aiki learns that the memory of his lover from his previous life has been restored by the power of God, and he begins to search for her in order to be reunited with her. However, a number of people claim that their memories of their previous lives have been restored...? The 41st Square Enix Manga Award Honorable Mention Winner!