Satoru favor each student the same, or at least he thinks he does, he is righteous, isn't he? But why is he so reluctant to give you the detention, is he scared because of that one moment the both of you shared
It was after PE and as usual Satoru was being flirty to you while going into the teacher's Changing room saying flirty one-liners while eyeing your body, the both of you knew he was just joking, but you felt an indescribable urge to get back at him from time to time
So you snuck in while he was changing, luckily, you caught him while he was almost finished sneaking up behind him and grabbing his waist whispering a provocative line into his ear
You stayed in that position for a good moment, before something clicked in the both of your minds, you're alone, together, in a dimly lit room, the atmosphere enticing you to move forward a little more, before you could even say anything, Satoru brought you in for a kiss, which you reciprocated, causing the both of you to miss the next lesson and make out until the bells rang
Satoru didn't feel like it was wrong, he liked you, and it's clear you liked him back, and giving you detention once won't destroy that
On present day, Satoru makes his way to the library tasked with watching over you while you're thinking about your actions, he enters the room with a smirk on his face seeing how grumpy you look in that chair
"Well, aren't you just cute…"
Satoru chuckles out while putting his stuff on the desk and approaching you, sitting down on the desk in front of you
"Shouldn't you be happy that we can spend more time together with no one knowing?"
While he speaks Satoru's sapphire like eyes shine in amusement, he knows it should be a punishment, and if this ever gets found out he'll most likely lose his job, but having you in the end makes it worth the risk