Side stories serialized exclusively in 4-Koma Nano Ace.
Makunouchi: Kubonouchi Eisaku Kessakushu is a collection of short stories that seinen author Kubonouchi Eisaku, known for notable titles such as Chocolat, Cherry and Watanabe, has written in his early days. The contents of this book include: Laplace Yocchore! Tosamaru-kun Bell Robot High School Girl Kaoruko's "Heartbreak" Bizzare -- The Terror of the Salmon-Man Robot High School Boy Kawarazaki Ayumu's "Seishun-I-N-G" Help! Viva Eros Academy Okappiki Eiji Dream of Pumping Up Present "Makunouchi" is a kind of bentou, served during Kabuki in the olden days. It either got its name from the lunch the audience would eat during intermission, or perhaps from the lunch actors would eat during this time (seems plausible since the actors are also "behind the curtain", which is actually the literal translation of that phrase).
In an alternate history of the aftermath of World War II, Japan has been cleaved in half, with the south—Honshu and the other islands—allied with the United States and the northern island Hokkaido annexed by the enigmatic Union. It was on Hokkaido that a mysterious tower had been built, a strand of metal reaching up out of the atmosphere, visible from the northern tip of Honshu. In 1996, three teenagers, Hiroki, Takuya and Sayuri, make a pact—they will build an experimental aircraft, almost invisible to surveillance, cross over to Hokkaido and unlock the secrets of the tower. Their dream was never realized, because Sayuri was sent to Tokyo for treatment after she fell into a coma. It is now three years later. The rosy illusions of youth have fallen away, but not the unbreakable strength of the trio’s promise. The truth of the tower will be uncovered, and with it, the link between it and Sayuri’s mysterious, carefully tended condition.
Taehyun Choi lives with his sister Hakyung Choi. You could say they have a normal life. On the one hand Hakyung has a good job and is successful, however Taehyun isn't good at studying. His life takes a drastic change when he accidentally learns that he and Hakyung aren't siblings. Which is why he decides to confront her, but then she suffers a serious accident and loses her memory. This is where everything will change, because those feelings of kinship will become much more important.
From MangaHelpers: Pregnancy is not a disease, so insurance does not apply. Obstetric treatments do not treat injuries or illnesses, so an obstetrician is not normally needed during the birth of a child. Still, obstetricians are needed because anything can go wrong during a pregnancy. A mysterious pianist at night, obstetrician Kounotori Sakura faces the many challenges and drama that come with giving birth to another human being. Note: Nominated for the 39th Annual Kodansha Manga Awards in 2015.
Those who are resistant to death are called "Demi-humans". That day, Kei Nagai, a High school student, should have died in a traffic accident, but he comes back to life shortly after. In other words, Kei is a demi-human. Since then, Kei's world changes dramatically. Terrified and without knowing what is going on, Kei is saved by his friend, Kai. Together, they flee deep into a deserted mountain. Later, a group of demi-humans who are hostile against humans contact Kai… Who is he fighting against? Who should he side with?
Story: Detective Akira Yusa sees his brother Shinichi killed before his very eyes. He spots a young girl, Kilico Sakaki, at the scene of the crime and instinctively knows that she did it. After a bloody fight, Akira arrests her. Trained as a professional assassin by her stepfather, Toshio Sakaki, in everyday life, Kilico acts like an ordinary college student. Her arrest is treated as a mistake when she manages to hide all evidence of Shinichi's murder. Akira's subsequent investigation of Kilico runs into difficulty when he finds that it's too big for a police detective to handle. Her encounter with Akira makes Kilico remember her terrible past and have doubts about being an assassin. Kilico goes to Taiwan to train as a jewel connoisseur, the Sakaki family's legitimate business, behind which they hide all their illegitimate business. Fired for taking his investigation too far, Akira follows Kilico to Taiwan. The two meet again and become very close, as they get involved in the internal conflicts within the Tenrenban gang, Taiwan's biggest Mafia group.
A condensed biography of Kublai Khan, as told by Professor Munakata. This is the second tie-in to NHK's Road of Civilization special.
The development of a gentle, warm relationship between a bookstore owner and a high-school student.
Ryu Shinjo is a student who is invited (forced) by his best friend to enter the world of virtual and online role-playing games (VRMMORPG). During the game and when choosing his class, Ryu decides to become a "priest", through which he can regain his health through magic and thus play alone. However, his playing style is far from what you would call a "normal priest". It is time to learn the story from Ryu, the priest who instills terror into anyone who dares to stand in his way.
When he was a child, Murakami was infatuated with a girl he called Kuroneko. She insisted on knowing about aliens and having met them, but no one believed her, even young Murakami was skeptical. One day, she decides to show him the aliens, but an accident occurs and Kuroneko dies while Murakami is left seriously wounded in the hospital. Years go by and Murakami obsesses on finding proof of the existence of aliens because of a promise he had made with Kuroneko. Then, one day, a new transfer student comes to his class, who not only looks a lot like Kuroneko but is named Kuroha Neko. And even though she insists on never having met Murakami before, the girl has superhuman strength and seems to even be able to predict the future! How will Murakami's life change now that he has been saved by this mysterious girl that claims to be a magician?