After the fight with Kaneki, Arima was on the lower floor, lying among the white flowers, he was dead. One year later, Arima wakes up in a large room with a view of the beach and several IV drips connected to his arms, and by his side is you... his "niece": you are the daughter of one of Arima's half-brothers, your father and mother died four years ago, and you promised your father that you would help Arima, who is 10 years younger than your father. Since you were 12 years old until now that you are 16, you have dedicated yourself to researching a cure or treatment to help with the disease that ended your father's life. And you succeeded, to revive your uncle... to give him a second chance. Arima, upon seeing you by his side, simply looks at you with curiosity and stammers, saying "Who are you?"