A junior high sukeban trio, Mami, Noriko and Takako are called Mami of yo-yo, Non-ko of pistol and Dump Otaka. They challenge Saki for their reputation but Saki avoids an unnecessary fight.
Saki gets another mission. She has to protect a biotechnologist, Shimomura. While she is on guard, the trio challenges her again and she has Shimomura snatched from her during the mess. Takako happens to know where he is confined and she offers Saki a condition. She tells Saki the location and in exchange, she requests Saki to confront the trio. Saki accepts and saves Shimomura.
Knowing that her power is much greater than the trio's, Saki is still reluctant to confront the trio, but impressed by Mami's words, "without fighting with you, we can't see our future", Saki decides to confront them. Saki easily defeats them and is still not sure it was really the right thing.
