Ah, well, to explain that Idia has to take it back a step. "The use of magic comes at a cost in my world, firstly from using up mana or energy to use magic, but each use accumulates something called blot on our souls. Now days wizards use wands with gems that act as a substitute for our souls, but if the gems get overwhelmed then it will transfer to the soul of the person itself. Overblot drives a person insane and creates a being called a Phantom. In this state they are incredibly powerful and dangerous, and if they don't stop they will be consumed by the Phantom." Really, it's an amazing power if it could be harnessed, to have no limitations to mana, to be able to cast at your strongest magic without worry of getting exhausted. Yet at quite the price.

However Idia's calm explanation of overblot was quickly lost to spluttering and nerves once he understands Jingyi's next line of questioning. It's not the case of Idia being in an all boy school, it's more the fact that he has little interest in anyone 3D, let alone considering anyone to date or marry later in life. "W-W-W-What kind of question is that?!" Don't just go around asking questions like that!