In this chapter, we learn that the "Watermelon Head Boy" is not at school, but is located by a mobile phone. He asks if there is anything special about the law of causation, and wonders if it relates to the mana field. He also asks if the school knows what he is attracting. He says he doesn't remember the uncertain period during which cause and effect occurred, and now he has appeared. He tells the school that he will become weak, and asks if he has bought insurance. He wonders if the beneficiary is the little shizi. He explains that he has delivered the message, and that the gift of selflessness will enable him to become weak. He adds that the location of hendi is in ancient times, and the time is 3030 years after the meeting with the Master of Life and Death. They found it, the cause of