The First One - S1.E6

Recovered from the virus, Juna and Tokio are ready to adjust to normal life again when Juna's father shows up, leading to a strained conversation between father and daughter. When school starts up again, Raaja appear during Juna's math class, and Chris shows up once again in the middle of the battle. When Juna and Tokio follow the math teacher home, Juna learns about his life and passion for teaching, but Tokio, as does the rest of society, sees his discussion as worthless and confusing.