In a city which should be familiar, there is the feeling of something a little different. Odokawa is a taxi driver who lives an ordinary life, taxing some quirky customers around. A slightly eccentric stranger who has no relatives nor any relations with other people, Odokawa's hobby is to listen to Rakugo on the radio before going to bed. For the time being, the only people he can consider as friends are his family doctor Gouriki, and his high school classmate Kakihana. Kabasawa, a college student who wants a buzz, Shirakawa, a nurse who's hiding something, comedian group Homo Sapiens, who isn't selling well, the city hoodlum Dobu, and the rookie idol group Mystery Kiss—the conversations with these people, which should not have meant much, lead to a girl who disappeared. (Source: MAL News)

Takuma Sakamoto is a hikikomori gamer who is mysteriously transported to the virtual world of his favourite MMORPG, Cross Reverie, with the appearance of his own character in the game, the Demon Lord Diablo. The two young girls who summoned him, the pantherian Rem and the elf Shera, attempt to use a spell to make Takuma their servant, but due to his magic ring with the ability "Magic Reflection", the spell rebounds, and both end up with magic collars stuck on their necks, thus becoming his servants instead. With a serious case of social anxiety, Takuma decides to act like his character while interacting with others, and makes use of his high stats and vast knowledge of Cross Reverie's lore to survive in his new environment, traveling along with Rem and Shera to look for a way to remove their slave collars, while helping them with their own personal issues that led them to summon him in the first place.

One day, Yomogi Asanaka, a first-year student at Fujiyokidai High School, runs into a mysterious man named Gauma who claims to be a “kaiju user.” The sudden appearance of a kaiju is followed by the entry of the gigantic robot, Dynazenon. In the wrong place at the wrong time are Yume Minami, Koyomi Yamanaka, and Chise Asukagawa, who are dragged into the fight against the kaiju. (Source: Funimation)

Centuries after the events of Saga Brave, a third race called the Mauve has emerged alongside Humans and Mazoku. Identified by their purple blood and immense intelligence, the Mauve are shunned by the other two races and are viewed as a threat to the peace of the world. Having experienced this prejudice first-hand, a teenage Mauve named Galette Revolt journeys forth to find a way for all races to understand each other by playing Battle Spirits. However, other factions from each race aim to maintain the peace/reform the world through more nefarious ways...