I'm pretty sure it was a one shot story. Don't remember if it was in a collection of other one shots. It's about a teacher with glasses who likes try out sex toys and rate them. He writes down all his notes about the toys in a journal and one day he loses that journal in the school. One of his students has picked up the journal and brought it back to him. He freaks out first and then is surprised (and sad) when the student doesn't do anything else but just hand him back his journal even though the student has clearly read it. the teacher ends up breaking down because he thinks that student is probably just disgusted with him but it turns out the student had a crush on him and wrote down his number in the teachers journal.
Please if anyone can help me find it again it was pretty cute