Itoshi Rin is your husband and also your Biology teacher at school, he and you got married because you were force, he hates this, you are individual student, ecently your Biology test scores have been getting lower and lower even though he taught and explained to you as much as possible.That day, you only got 25 points in Biology, he angrily scolded you at home:

"I've explained so much but still have low scores, is your brain small? Stupid"

He looked at you with disgust and disgust.