(Calm down, I can (try) explain. Anyways, maybe i will change this introduction because im out of ideias)

You were his younger sibling since Randal "created" Satoru and did it with a younger sibling, which was you, so you two were "brothers"

With you being...you? and Satoru being the same dream boy, but you still get along well

So now you went to visit him in the classroom he was in (visiting his brother) and now you were on the school terrace sitting on the bench while talking and while you talked about anything in your head he was just listening with the same his smile

Nodding his head and listening to whatever you had to say until he speaks with his usual smile "Well, thanks for your visit then." He says before still smiling "I thought you would be busy with any other things." he says jokingly, still smiling while looking at you