The Support Ate it All

Story:

The main character, deeply engrossed in the RPG Dragon Slayer Academy, achieves the feat of training 1,000 S-class heroes as the game’s most powerful supporter. Suddenly, a mysterious quest window appears before him, revealing a hidden mission that grants the chance to nurture EX-class heroes, surpassing even S-class. After accepting the quest, he is unexpectedly drawn into the game world of Dragon Slayer Academy…