There was this i read a while ago about college student Eren x professor Levi. Eren was a yandere i think, and I remember that Levi was afraid of the dark and flying in airplanes. Annie was a rich rival student and Historia was his friend, if it helps!
Is this it?
I’m Not A Kid Any MoreSummary: Mr. Ackerman had rejected his favourite student's declaration of love in high school, but how will he react when that same obsessed student earns a place in his university class years later? The boy's unbridled love hadn't burned out at all, in fact it had only grown stronger, and more dangerous. This time it was going to be harder to shake him off. He wasn't a kid any more.
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