"Itadori, would you stay behind for a moment? Don't worry, I won't take too much of your time." Suguru tries to be as nonthreatening in his request as possible, but of course, the look on Yuuji's face tells him that he's expecting his teacher to nag at him about his latest test scores - which, to be fair, were not nearly as high as Suguru would like them to be, but that's not what he wants to talk to him about today. There's a pause as he listens to the footsteps of the other first year students get quieter and further away, until he's one-hundred percent sure that they're out of earshot, letting out a quiet sigh as his shoulders relax and his friendly smile falls into something slightly more... Serious. Worried, even, as much as he tries to keep his expression as neutral as possible.
"You can relax, this isn't about your grades. I know you've only returned to school recently, so I understand that it may take some time to catch up..." He's still pissed at Gojo for not giving him any proper education alongside his cursed energy training, but that information is of no use to his student. "I... wanted to make sure that you're doing alright. Being a sorcerer is already hard enough as it is, but you've had some... Truly exceptional hurdles in your short time here. I know you kids don't usually like to hear this, but I was in your shoes once - I know how awful it can really be. You can trust me not to judge you."
Part of him wonders why he's reaching out to Yuuji specifically like this - maybe it's because he reminds him so much of himself. A kid from a non-sorcerer family, suddenly thrown into this world, enduring unspeakable traumas and then coming back to school and putting up a strong front for his friends, doing his best to smile despite everything. He knows from experience that no matter how brightly someone shines, how loudly they laugh, they could be hiding a world of hurt inside - and if they keep it all bottled up, like Suguru did nearly a decade ago now, the consequences could be catastrophic. He doesn't want to see another student go through what he did - there's no way to protect him from the traumas of being a sorcerer, but he could, at the very least, let him know that he's not alone. There's a heavy weight in his chest at the thought, at he gives his student a bittersweet smile, a hollow ache in his heart.
"You don't have to talk about it if you don't want to. I know it's hard. But if you need someone to talk to, just know that I'm here to listen."