Based on the Fire Emblem Games. Note: Released in Enix Supercomic Gekijoh Volume 2.

Marriage Royale's story revolves around the male protagonist, a high school student named Tsukasa Hinomoto, who is told one day by his parents that he was adopted. Furthermore, they tell him that his real father is a manager of a large company, meaning he is very rich and holds a lot of power. Tsukasa's real father wants his son to marry a good woman, so he sets up an event known as Marriage Royale where beautiful girls from all over Japan will come together at a school built especially for the event and vie to become Tsukasa's fiancée. The school is located on an isolated island near Japan, and Tsukasa himself is taken there to live in a mansion in the care of two twin maids: Miku, the elder sister, and Miu, the younger sister. (Source: Wikipedia)

Akane, Shiraishi, and Eki go to the same school and additionally participate in the physics club. Akane is the oldest, she is the head of the club, Shiraishi is the smartest, and Eki is the most unpredictable and believes in the occult. One day Eki had a prophetic dream in which a plane crashed and a ship sank. And then she wondered why planes fly and ships don't sink at all. It turns out that the science that can answer these and other questions is called hydrodynamics (or fluid mechanics), and Eki with Akane asked Shiraishi to tell them about it. Together with our characters, we will take a fascinating journey into the world of fluids and learn many new and interesting things about their properties and laws which they obey and which we use in everyday life without even realizing it. (Source: DMK Press, translated)

A prologue to Chaos;Child released as part of Science Adventure Series 5 Years Jubilee.

Centering on the restoration of the Kuroda clan and the growth of Kanbei Kuroda, this is a historical ensemble drama depicting the figure of Kanbei Kuroda, who survived the Warring States period utilizing the Kuroda clan's famed 36 strategies in creative ways. (Source: Mangapedia, translated)

Munns has come from afar to Japan to train to be a butler. Awaiting him is the legendary butler Yagi, who loves his charge just a little too much, a mansion full of mysteries and traps, and more… Follow his harrowing journey to become a great butler--a journey he never even consented to! (Source: the manga habit)