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The idol in the red track suit really spun my head instantly. One of those Wow reactions three quick into shots in . . .

Looked for the cast

The AV-Wiki had the cast for this (in Japanese) as

Minato Haru 湊波流

Shiraishi Nagisa  白石なぎさ

Akimoto Sachika 秋元さちか

Nijimura Yumi 虹村ゆみ

Believe the lovely idol in red, who spun my head so, the one in the third skit (of four) is
Akimoto Sachika 秋元さちか