The story follows Kazuki Kurusu, a criminal contractor / coordinator who lives with his best friend, Rei Suwa, a professional assassin who has been raised from childhood to be a contract killer. Kazuki is outgoing and loves gambling and women, while Rei is a man of few words who spends his off time playing video games. One day, the two buddies end up caring for Miri Unasaka, a four year old girl whose father is a mafia boss, after Miri accidentally wanders into a firefight in a hotel while looking for her father.
Akihabara is the center of the universe for the coolest hobbies and quirkiest amusements. In the spring of 1999, bright-eyed Nagomi Wahira moves there with dreams of joining a maid café. She quickly dons an apron at café Ton Tokoton, AKA the Pig Hut. But adjusting to life in bustling Akihabara isn't as easy as serving tea and delighting customers. Paired with the dour Ranko who never seems to smile, Nagomi must do her best to elevate the Pig Hut over all other maid cafés vying for top ranking. Along the way she'll slice out a place for herself amid the frills and thrills of life at the Pig Hut. Just when Nagomi's dreams are within her grasp, she discovers not everything is as it seems amid the maid cafés of Akihabara.
General of the Three Kingdoms, Kongming had struggled his whole life, facing countless battles that made him into the accomplished strategist he was. So on his deathbed, he wished only to be reborn into a peaceful world... and was sent straight to modern-day party-central, Tokyo! Can even a brilliant strategist like Kongming adapt to the wild beats and even wilder party people?!
Kukuru Misakino, an 18-year-old high school girl working in an aquarium, meets Fuuka Miyazawa, a former idol who lost her place in Tokyo and escaped. Fuuka will spend her days in the aquarium with her own thoughts in mind. However, the crisis of closing is approaching for the aquarium, as the girls explore their dreams and reality, loneliness and friends, bonds and conflicts.
In a world very much like our own, great race horses of the past have a chance to be reborn as "horse girls"—girls with the ears and tails of horses as well as their speed and endurance. The best of these horse girls go to train at Tokyo's Tracen Academy, hopefully moving on to fame and fortune as both racers and idols.
Special Week, a high school horse girl from the countryside, has just transferred to Tracen, and she's determined to fulfill her promise to her mother to become the best horse girl in Japan. On her way to school, she takes a pit stop at the race track and instantly falls in love with Silence Suzuka's style, becoming determined to race on the same team as her.
One day during Yōta Narukami's last summer vacation of high school, a girl named Hina suddenly appears and proclaims herself "the All-Knowing God." Hina announces to the thoroughly confused Yōta, "The world will end in 30 days." Yōta then witnesses Hina's god-like powers of prophecy, convincing him that her powers are real. Hina's naive innocence belies her powers, and she decides to live at Yōta's home for some reason. Thus begins an eventful summer before the end of the world.
In Tokyo, there is a place called Velude Way. It is a district notorious for its performers and theatrical groups. Izumi Tachibana, who was previously a stage actress, arrives with a letter that reads, "Full of debt! Zero customers! Only one actor!" It describes the current state of the once-popular theater group Mankai Company. Her task is to rebuild the company to its former glory as the new owner and chief director.