故事发生在名为銀玉産業的一家著名的日本Pachinko公司。在这个公司里工作的OL銀野七海，是一个看似普通的上班族，但她隐藏着一个令人意想不到的秘密

白天，七海是一个清廉潔白、备受男性同事憧憬的优秀员工。她与公司的精英白川義男交往甜蜜，成为了美男美女的佳偶，备受同事和媒体的关注。

然而，当太阳下山后，七海的真正个性开始浮现。她穿上性感的晚礼服，化上艳丽的妆容，踏入了她的另一面——夜晚的女神。她成为了Pachinko世界里的弹珠天使，展现着完全不同的魅力。

在日落后的夜晚，七海踏入ホール（指Pachinko店内）的门，就像是蜕变了的蝴蝶。她以一个完全不同的形象出现，吸引着无数男性玩家的目光。在这里，她不再是那个温文尔雅的OL，而是一位热情奔放、风情万种的女性。

The story takes place in a well-known Japanese Pachinko company named Silver Jade Industry. The OL Ginno Nanami who works in this company is a seemingly ordinary office worker, but she hides an unexpected secret

During the day, Qihai is a clean and honest employee who is admired by male colleagues. She has a sweet relationship with Yoshio Shirakawa, the company's elite, and becomes a lover of beautiful men and women, attracting the attention of her colleagues and the media.

When the sun goes down, however, Nanami's true personality begins to emerge. She puts on a sexy evening dress and gorgeous makeup, stepping into her other side - the goddess of the night. She became the pinball angel in Pachinko's world, showing a completely different charm.

At night after sunset, Qihai stepped into the door of Hōru (referring to the Pachinko store), like a transformed butterfly. She appeared in a completely different image, attracting the attention of countless male players. Here, she is no longer the gentle and elegant OL, but a passionate and unrestrained woman with a variety of styles.