My imaginary perfect senbetsu results would be
A: Mariko (center)

Congrats!

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No tie-breaker rounds because 15 year old Kobayashi Marina isn't allowed to work after 9PM

Final results:
1. Shinoda Mariko
2. Fujie Reina
3-4. Kobayashi Marina, Minegishi Minami
5-8. Akimoto Sayaka, Sato Sumire, Oya Shizuka, Maeda Ami
9-16 Hikawa Ayame, Umeda Ayaka, Kasai Tomomi, Kuwabara Mizuki, Kojima Haruna, Yamaguchi Yuki, Yamauchi Suzuran, Kitahara Rie