Vol 2: Ch 78 - Rei and Tae
Yes, Rei really seated beside Tae's family members but she doesn't know and aware of it, if she knows she will be panic for sure but well she quite knows how to react in a different way when she's in panic.
Both Day 1 and Day 2 successfully finished the concert without any problem but then Day 2 it's quite different from Day 1 because on the second day of the concert it will end very late. Since its Day 2, the concert almost ended at midnight and it's ended very late at night. Rei leaves alone but then she's no worries because she had a car, except for the other one who's the one afraid instead of her.