The Yakuza's Guide to Babysitting

Because of his extremely violent nature and his nickname "The Demon of the Sakuragi Family," the first lieutenant of the Sakuragi Family, Kirishima Toru, is feared by the rest of the yakuza world. One day, Kirishima is summoned by the head of the Sakuragi Family and is tasked with taking care of his only daughter, Sakuragi Yaeka. But Yaeka is very shy and doesn't really open up to him, which perplexes Kirishima. He then finds a notice about an open house that Yaeka's class is having, and it happens to be that day. Then Kirishima...

Kirishima gradually gets used to his job as Yaeka's caretaker. They go to a fireworks festival together and that ends up bringing them closer together. Later, they plan to go see Yaeka's mother, Miyuki, who is in a coma in the hospital, but then Yaeka gets upset and says that she doesn't know her mother because she's always asleep and says she doesn't want to go. But then, Kirishima says...

Yaeka goes to the hospital to visit her mother. Kirishima goes with her, and they both run into Aoi, Kirishima's senior and the former first lieutenant of the Sakuragi Family. On the way back from the hospital, Kirishima and Yaeka find a high school girl and an abandoned kitty. Yaeka asks Kirishima if they could take the kitty home, and...