Magical Explorer, Vol. 1 (light novel)

Reincarnated as a character in the legendary video game, "Magical Explorer," our hero tries to win the hearts of the game's heroines and emerge as the most accomplished student at the Sorcerer's Academy.
Reincarnated as a character in the legendary erotic game, &;Magical Explorer,&; it doesn&;t take long for our hero to discover that he&;s been designated the unlucky side-character rather than the game&;s lady-killer protagonist. Not to worry, though! Armed with his vast knowledge of the game (and a few cheats) he&;ll do whatever it takes to win the hearts of the game&;s heroines and emerge as the most accomplished student at the Sorcerer's Academy!