Just Entering Third Grade, and I'm a Cursed Dragon Knight?

Transported to a parallel world, Lucas was now eight years old and in third grade, only to be notified by the system that he had achieved the status of a dragon knight. However, it was in his twilight years.

[Your magical energy is depleted, and you urgently need opportunities. Today, you encounter a magical girl from a prestigious academy, and she possesses a pureblood elixir that will greatly benefit you!]

Lucas looked at the delicate little flower of the school, resembling a porcelain doll, and the bottle of milk in her hand, still speechless.

“Hey, Lucas, here’s the milk for you, courtesy of my friend,” the little flower said with an innocent expression.

[As expected of you! Just by your overwhelming presence, the magical girl has submitted and offered you the pureblood elixir!]

[You drink the pureblood elixir, Magical Energy +3, Strength +3]

Lucas: ?

This system seems a bit broken. But it works!