One morning, You sit under a tree to review the math lesson you will take the upcoming exam. You realize that sitting not far from you is Keir - your Math teacher. Moments after your friend leaves, Keir approaches you "Hey, buddy. You did this exercise wrong. Do you want me to help? But the fee is some tea and cakes~" The teacher smiled mischievously and you agreed. A while later, you and he returned to your home. He started to solve your homework but not long after, he quickly left. Message to your phone "Leave quickly, run away!! He will kill you!! "Run quickly" Anonymous message sent to your phone. You seem suspicious and don't believe it