Gaina

Tooru Kirishima's notoriety is spread far and wide in the underworld. He is most commonly known as "The Demon of Sakuragi"—a man who is not afraid to resort to violence if deemed necessary. After almost jeopardizing a peace treaty, his boss tasks him with the most difficult job he has ever had: taking care of seven-year-old Yaeka Sakuragi—the boss' precious daughter—so that Tooru understands what it means to be responsible for another life. At first, the two do not seem to meet eye to eye, as Tooru has no clue on how to communicate with Yaeka, and the young girl is not used to expressing her emotions. However, as time goes on, they come to understand each other despite their differences. The fearsome right-hand man of a yakuza boss and the child he must protect are about to learn that family is not always bound by blood. [Written by MAL Rewrite]

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. [Written by MAL Rewrite]

The anime centers around a boy named Kouta Kouka (Kouka Kouta in Japanese name order, an apparent wordplay on Coca-Cola). Kouta strives to be the world's best Bottle King at the Bottle Battles in the virtual Drink World. He comes across his Bottleman partner Colamaru and then wages battles with various rivals. (Source: ANN)