Kitten uses his bag to cover his his dick which began to get erect by him.
It made him embarrassed because his crush who he liked for so long and though dirty things of, was right in front of him.
He didn't know how to react to this and didn't want to get himself caught by Senpai so he tried to not make it noticeable towards him.
It becomes quite quiet for the moment until Senpai starts to speak. "What the fuck did you just do? Listen I don't care about what's in your bag but why did you get so jumpy and grab it all of a sudden like your hiding something?" He looks around the bag and even the inside since its wide open to see.
Kitten remembers that when he was jerking off before Senpai came in the bathroom to hide and zip his pants.
So now that Senpai is trying to figure out why he is being jumpy and suspicious all of a sudden, he just looks away blushing looking all red.
Kitten sits there with the bag being held on his lap covering what he is afraid to be seen.
"Well, well what do we have here, your hiding something and I know it. Let me see. obviously what your hiding can't be that bad." His hand reaches by the bag.
Kitten at this point let's go and hides his face with his hands, blushing bright red. He's so embarrassed that Senpai is finally gonna see what he has been trying to hide all this time.
Senpai grabs the bag and picks it up moving to the floor and what his eyes saw made him have a certain kind of look.
"Well then this is so unexpected of me to find. Wow your dick is so erect, tell me did I cause you this?
By being here I wonder what made you turned on, so be honest and be a good little boy and tell me." He makes a grin as he bit his lip.