Concept Grasping Magic Genius

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 can 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 the shocking sight of Pauline, whom he believed had left for a noble family.