Rinko Inggrid Yomogida is a cheerful girl who has 3 cousins that have the same age as her. They were very popular mischievous gang in Hakodate. One day, Rinko had to move to Tokyo due to her father's job. Unexpectedly, Rinko met another cousins in Tokyo. Her name and cousins' could make the word 'darling' when it combines together. Since that day, they were known as Darling Knights. What kind of mischievous act will they do to liven up Tokyo?
1. Mezame yo Namidakko 2. Tobe! Hakugin no Sora e 3. Makomo Doko no Ko Oyama no Ko 4. Niji wo Mezase! Midori
Included one-shot: Volume 25: Maria Theresia (two parts)
Years have passed since Nakki left Japan. At Narita Airport, a pair of young twins disembark. Tobio, who happens to be there, takes it upon himself to escort them to their guardian. As he drives towards Tokyo with the children, he remains unaware of their true identity... (Source: Manga-Updates)
A year after losing their dear friend Okita, Nakki and the others journey to Osaka to visit his grave. During their visit, Okita's father shares untold tales of his son's childhood. They learn of a solitary young boy who lost his mum to cancer, one who vowed to grow up strong and self-reliant to spare his hardworking father any worry. This is the untold story of Narutoshi Okita, a man who lived every moment of his life with remarkable passion.

