Before reincarnating, he was offered a choice:

Sacrifice something precious,
and gain a power beyond human limits.

He accepted without hesitation.

The price?

His body would never grow again.

In exchange, he obtained monstrous mana reserves and a divine-level ability known as Microscopic Mana Control.

Reborn into a romance fantasy world with the appearance of a harmless child, he expected a peaceful life studying magic.

Instead, his new family abandoned him.
Assassins targeted royalty.
And after saving the Second Princess with impossible magic, everything spiraled out of control.

“Isn’t he adorable?”
“…You’re staying by my side from now on.”

Now dragged into royal politics, noble conspiracies, and dangerous palace intrigue, the tiny mage finds himself surrounded by people who either fear him, admire him… or become strangely obsessed with him.

After all,

beneath that small frame lies enough power to overturn an empire.