Chisato and Mahiro are two high school girls who are about to graduate. They also happen to both be highly skilled assassins. When the organization they work for orders them to share a room, the relationship between the pair quickly turns sour. However, when they find themselves targeted by the yakuza, the girls quickly realise that they will have to find a way to work together.

After being suspended from their agency due to a rules violation, teenage hitmen Chisato and Mahiro are forced to get “real” jobs to make ends meet. But while the elite duo is forbidden from executing targets or enemies under any circumstances, two aspiring rival hitmen decide to eliminate the competition while they’re vulnerable—leading to a lightning-fast showdown between trained killers.

Shizuya (Ito Kentaro), the only son of the Kanto region’s largest gang, the Shinshu Clan, which he hates being associated with, works instead for a design company. He works diligently while developing a liking for his strong-willed colleague Akino (Kakei Miwako), but when his father is shot and killed, the battle for succession intensifies. Peaceful lives are transformed.

In the year 995, due to a secret talk between Michinaga Fujiwara (Akira Emoto) and Seimei Abe (Terunosuke Takezai), Yorimitsu Minamoto (Kanji Tsuda) is ordered to subjugate ghost Shutendoji, who lives in Oe Mountain. Yorimitsu Minamoto and his men soon encounter difficulties in carrying out their mission due to the appearance of strangers. These strangers are handsome warriors Munechika Mikazuki (Hiroki Suzuki), Kunihiro Yamanbagiri (Yoshihiko Aramaki), Hasebe Heshikiri (Masanari Wada), and Toushirou Honebami (Fuma Sadamoto) and they are trying to protect history.

The five employees of Studio Delta were finishing their work and preparing for their end-of-year and New Year holidays. Ume's friend suddenly had a plan and couldn't help Ume with the Comic Market which was happening at the end of the year. Momoe decided to accompany Ume and only remembered on that day that she is supposed to meet her favorite A-kun. In addition, a sudden work request happened at Studio Delta and the work needs to be completed by New Year's Eve. Will the employees be able to welcome the New Year safely?

When Chizuru joins as a teacher at Umega High School, she hears an amateur orchestra perform. Reminiscing her old days of playing the violin, she decides to enroll in one.