The Concept-Grasping Magical Genius

After losing everything, Rowan finds a mother figure in Pauline, but her departure leaves him grieving. In the wake of her absence, he awakens to Mana, a power that lets him see the Mana of other people as well as his own. Though Pauline is gone, Rowan can use Mana to feel that she is still with him. Then he encounters a shocking sight: Pauline, whom he believed had left to join a noble family.