As a 18yr old I dont see how this is wrong tho because they gave consent and I dont see the problem with it. I personally think that if your attracted to someone then go for it. Like if it was underage then id totally understand how its a crime but they both were old enough for consent. Like I know that people would say different but they both wanted it. Its a fantastic series and id totally recommend it and its definitely full of drama. If it doesnt affect the way the teacher teaches and the students grades to be biased then why is it an issue.