Teruaki threatens to assign -5 points to Natsuko unless gives back their phones. She does so but Teruaki assigns +1 to Nobuaki, -4 to Natsuko, and -1 to her best friend Aimi. Natsuko passes rather than break her hand. The negative point to Aimi was a test Aimi asked for, to see if Natsuko would break a finger to save her, as Teruaki did to save Natsuko, which Natsuko failed. Everyone else passes and Aimi is the last person to take a turn...