Nobuyuki Tanaka

Marco and his family live in Genoa, Italy, a poor town where many local Italians went to work overseas. Marco's mother, Anna, is among one of them. Initially, Anna keeps writing back home while working in Argentina, but one day, the letters stopped. The boy then decides to search for his mother. Despite the journey's difficulties, Marco heads off into Argentina's interior, to meet his mother. (imdb)

In a time when war abounds and the future of planet Earth seems questionable, the appearance of a mysterious young boy prompts four young women to realize their true powers to do battle ... (imdb)

Five supernatural factions have been fighting against each other for who knows how many centuries, with the beginning of Aquarian Age always in mind. Kyouta, soon begins to see visions of mystical girls fighting, except they do exist. Soon he and his girlfriend Yoriko become involved and the battle for Earth and Aquarian Age lies in their hands. (myanimelist.net)

In the future, a junior high student, Kusakabe Sakura, will offend God by inventing immortality so that women will stop aging after they turn twelve. Dokuro-chan is an angel from the future sent to kill him. However, Dokuro-chan thinks that Sakura can be spared, so her idea is to constantly occupy Sakura so that he will never be able to invent the technology. Sometimes the angel will go crazy and kill him with her bat, Excalibolg, but she can revive him easily. "Pi-piru-piru-piru-pi-piru-pi!" (myanimelist.net)