Hanabi-chan wa Okuregachi

Musashi Shinonome inherits an old pachinko hall from his grandfather and visits the place with little idea how he is going to make it work. Inside, he finds a sleeping girl who introduces herself as Hanabi Hana Ariake and claims to be a pachislot machine that has become a complete human. To prove it, she can transform and even fire fireworks from her body.

Musashi soon meets her sisters, Versus Ikusa Takanawa and Thunder Rai Nihonbashi, who are also gaming machines in human form. Instead of managing an ordinary hall, he finds himself responsible for three strange girls trying to attract customers and keep the business alive, while their clashing personalities turn every working day into an unpredictable show.