Reito Mizuhara is a medical student at the National Advanced Medical School in Tokyo who contracts a rare, lethal disease called cellular sclerosis. In order to be treated, he is put into cryogenic sleep for five years. Upon awakening, he learns that a year into his slumber, a worldwide pandemic broke out, caused by the novel Male Killer (MK) virus which exclusively afflicts males and has killed all other men on Earth. Fortunately, Reito and four other men were spared during their cryosleep and are now immune to the virus. As the only men left in the world, they are thus tasked with mating with as many women as possible to repopulate the planet. However, Reito is committed to his childhood friend and sole love interest, Elisa Tachibana—only to learn that she went missing three years ago. While the other male survivors adapt accordingly to this new world, Reito instead chooses to pursue Elisa, fight never-ending temptation, and investigate this mysterious virus.

During the An Lushan Rebellion of the Tang Dynasty, monsters are everywhere and the people were destitute in the Central Plains. Li Haobai started from the Bashu and wanted to go to the front line to make a meritorious deed. On the way he was swallowed by the monster. By coincidence, Li Haobai and the guardian of the dragon’s veins merged with each other to obtain the power of the black dragon. And he has since been involved in the struggle of various forces. (Source: wawayu.tv)

After Germania invaded a neighboring country in 1939, Europe spiraled into a devastating war. During the war, Germania set its sights on the weak alpine country of Elystadt. Boasting a far superior military and having achieved profuse success earlier in the war, it was expected that Germania would conquer Elystadt with ease. Matters are only made worse for the small country when Germanian soldiers capture their princess, Ortfiné Finé Fredericka von Eylstadt, as she is heading to a crucial meeting with Britannia. Yet, when a concurrent Germanian transport mission goes awry, Izetta, the last witch alive, escapes. When she recognizes Princess Finé from her childhood, Izetta rescues her from the Germanian soldiers by making use of her magical abilities. Now reunited with the princess, Izetta pledges to protect Elystadt from Germania, and with the last surviving witch on their arsenal, Elystadt hopes to turn the tides against the imperialist war giant.

Following the most recent brutal battle, the gods now hold the lead against mortals in the one-on-one tournament that will decide the fate of humanity. With three wins under the belt of the divine beings, the humans only have 10 matches left to save themselves from extermination. The Supreme God Zeus intends to take the upper hand by sending Buddha—a benevolent demigod loved by all of humanity—into the fray. In a shocking twist, Buddha announces his intention to fight for humanity. Enraged by this betrayal, the gods call upon the Seven Gods of Fortune to take Buddha down. As their battle rages on, a mysterious entity manifests in the middle of the arena, throwing the entire competition into disarray.