Magic Theory Prodigy

Pauline became a mother figure to Rowan, who had lost everything.
After Pauline left, Rowan grieved her and awakened to a power called 'Mana'.
What's more, Rowan could even see the Mana of other people!
Through mana, even though he's apart from Pauline, he can always feel like she's with him...
One day, Rowan encounters a shocking sight of Pauline, who he believed had left for a noble family.