The Silver Guardian 2

Suigin Riku, a student at the prestigious Shinryou Private Academy, juggles multiple part-time jobs to afford tuition and spends his free time playing the RPG game Dungeon Century. There, he develops an online friendship with Rei Riku, a girl he has a crush on. Unbeknownst to Suigin, Rei is also his online friend. When Rei is kidnapped and taken into the new game Grave Buster, Suigin enters the game to rescue her.