Recent college graduate Musashi Shinonome is visiting the Shitamachi God Heaven pachinko hall after inheriting it from his late grandfather. Inside, he stumbles upon a girl sleeping in a futon, who wakes up upon his arrival. She introduces herself as Hanabi Hana Ariake: a self-proclaimed perfected pachislot machine that has turned into a human. To prove this, she demonstrates her ability to transform and shoot fireworks out of her body. Over the following days, Musashi meets two of Ariake's human pachislot machine sisters—the energetic Versus Ikusa Takanawa and the loving Thunder Rai Nihonbashi. Now, Musashi and the dynamic trio must work together to make the grand reopening of Shitamachi God Heaven a success.

Kajika Louisa Kugami Burnsworth is the only daughter of Harry Burnsworth, an influential and respected industrialist who has the power to move the world. There was a threat on Kajika’s life when she was just two years old, and her mother died protecting her. After this tragic incident, Harry sent his only child to an isolated island, Giviolle, where she was raised by the island’s native, Maria. Kajika’s companions during her time there include a white leopard named Mustafa and a boy named Li Ren Fang, who visited her two or three times a year. Kajika, now fourteen, returns to her father's side, only to be told to begin a game to find her future husband. Harry makes sure that Kajika willingly participates in this game by telling her that she needs to face the harshness of her fate along with the man she chooses to be her husband. She needs to decide among the three candidates that Harry has personally chosen, but it won’t be easy. Kajika must figure out who they are and where they are without any information to go on except that they all possess an irresistible brilliance and charm. All the while, the men aren't even aware that they are the chosen ones. Kajika must also choose wisely, as her partner has to willingly accept her to be his bride. Hansakeru Seishounen revolves around endearing love, intense passion, noble friendship, undying loyalty, family relations, and political intrigue. The heaviness of Kajika’s fate is real, the threat on Kajika’s life is inevitable, and the husband game is more than just a mere game. Harry needs to find a suitable partner to protect his daughter before someone discovers Kajika’s deep secret—a secret even she is unaware of.

Makino Tsukushi, a girl who comes from a poor family, just wants to get through her two last years at Eitoku Gakuen quietly. But once she makes herself known by standing up for her friend to the F4, the four most popular, powerful, and rich boys at the school, she gets the red card: F4's way of a Declaration of War. But when she doesn't let herself be beaten by them and is starting to fall for one of the F4, Hanazawa Rui, she starts to see that there is more than meets the eye... (Source: ANN)

Anzu goes to a kindergarten with her friends, the shy Koume and the eccentric Hiiragi. Together they try to make their caretaker, Tsuchida Naozumi, fall in love with Anzu. However, he is clearly more interested in the pretty Yamamoto Nanako, a fellow kindergarten teacher who supervises the class next door. Even though Anzu tries to convince Tsuchida to marry her when she grows up by using various methods. Tsuchida, on the other hand, hopes to get a chance to date Yamamoto, and, if not, to marry her.