Lucifer's Revenge

The story a mage who will die and become a statue in the Honorary Hall and then forgotten, even though all he did. Whereas the Prince will get cheering crown and festivals will be held to celebrate the crowning of the Prince. Then she, who left him will also forget him and marry Prince, all while thinking that she is doing this for the kingdom.

Now-now the story like this will become a lot boring, at least for those who like the protagonist not the Prince, so let's send him back in time.