Far in the future, the human beings were pushed into the deep underground world called Labyrinth and they are living shoulder-to-shoulder. The Labyrinth has several colonies with severe settings such as one having an insanely high temperature, while another is full of gold and silver. Among those, in a colony of Pinyin, resides a curious nine-year-old girl named Memempuu and her father Gaganbar. As "workers" aiming for survival, they live with the lowest profession of riding a working robot to dig ore. One day, Memempuu pestered Gaganbar, a cave examiner who makes maps of the internal part of Labyrinth, to go travel together with her to find her mother. As a "marker," Gaganbar holds the most dangerous yet attractive profession. One step outside the colony is already deemed to be a dangerous area and meeting a huge mysterious creature that loiters the cave, one's chance of living will be cut down to five percent. Since it is a dangerous racket to explore the unknown world, the map they hold is valuable and can be sold at a high price. However, is the price for their curiosity higher? What could be the cruel truth that is hidden among them? What awaits at the end of the test? In this travel story between a father and a daughter surrounds adventure with family love. (Source: MAL News)

Akari Mamiya, a first-year student from Tokyo Butei High, idolizes the S-rank Butei Aria Holmes Kanzaki and wishes to follow in her footsteps. Despite only being an inept E-rank Butei, Akari's resolve to improve remains strong. After the idea of having an Amica contract (a senior-student mentorship program) with Aria is brought up, Akari submits a request form attempting to establish said contract. Her classmates and friends do not expect Aria to accept Akari's request, mainly because of the girl's strict selection process, but to everyone's surprise, Aria gives Akari a chance through a test, which Akari miraculously passes! However, Aria will not officially make Akari her Amica until Akari meets her standards. Training under Aria will be no easy feat, as she has to concurrently manage her relationships with her friends. Will Akari have what it takes to walk down the same path as her idol?

Maintaining a delicate balance of power, the kingdoms of Amoria, Ishilfen, and Vanrodis rule over the continent of Kuna'anh. Even the slightest hint of trouble in one country could spark a continent-wide war. However, their one common fear is the evil dragon Daganzord, whose only meaning of existence is to devour and destroy all life. Ten years ago, a group of mages worked together in an effort to seal away the malevolent beast. But the ritual—later known as the "Balbagoa Tragedy"—was a failure, and many lost their lives. Though his parents died in this tragedy, Hiiro was saved by the swordsman Giruu. Under the latter's tutelage, Hiiro learned swordsmanship with the sole purpose of seeking revenge. Now a budding master himself, he sets out in search of Daganzord in order to realize his long-awaited vengeance, or to be consumed by the dragon and meet the same fate as his parents. [Written by MAL Rewrite]

A series relating the intertwined stories about the "first loves" of several middle-schoolers and high-schoolers. Each episode tends to focus on a different character, however the developments established during previous episodes continue to play smaller roles in those following. As the series progresses, an array of unusual and unexpected love webs begin to blossom.