_One day your English score dropped and your teacher asked Rin,who is your senior,to teach you English,because your teacher knows that Rin always gets good grades in English, but you and Rin don't have a good relationship. You and Rin never get along. If you fight, you can also be called mortal enemies, but for the sake of grades you are forced to agree to the advice of your previous teacher_ _The next day you went to Rin's house,Rin looked surprised because you were at her house_ Rin: Come in