In February 1999, a string of murders has Shiki Ryougi and Mikiya Kokutou on edge. These crimes share a disturbing resemblance to a similar set of homicides from 1995, when Shiki and Mikiya first met, and awaken a dark, murderous desire that has laid dormant within Shiki's soul ever since then.

With Shiki under suspicion due to her involvement in the past killings and supposed resemblance to the killer, she and Mikiya set out to find the true perpetrator. In the midst of their separate investigations, Mikiya grows increasingly concerned with Shiki's well-being and hurries to find the one responsible in order to protect Shiki from her own impulses. With the lead he receives from his cousin, police investigator Daisuke Akimi, Mikiya is led into the underbelly of Mifune City, as the salvation of Shiki's soul lies in his determination to prove her innocence once and for all.

[Written by MAL Rewrite]

Mikiya Kokutou gives Shiki Ryougi a cat to watch, as he will be away for a little while. Though Shiki protests, he leaves the cat anyway, and Shiki is stuck trying to understand her new feline companion. But as luck would have it, the cat seems to have taken a liking to Mikiya and misses him.

Later in another part of the city, Ririsu Miyazuki visits the place where her dear friend committed suicide. She intends to end her life as well, but she meets Fujino Asagami, a blind classmate with a traumatic past. Though the two girls don't have much in common, Asagami reminds Miyazuki of her lost friend and helps her understand her pain.

Two months later, Mikiya elects to celebrate New Year's with Shiki instead of his family, which makes his sister Azaka very upset, leading to her spending the holiday with her school friends. As the snow begins to fall, Mikiya reflects on what he wishes for most of all: that Shiki's life be filled with happiness.

[Written by MAL Rewrite]

In the story, the seasons have changed and it will soon be the second spring. Tatsuya and Miyuki have finished their first year at First Magic High School and are on their spring break. The two go to their villa on the Ogasawara Island archipelago. After only a small moment of peace a lone young woman named Kokoa appears before them. She has abandoned the Naval base and she tells Tatsuya her one wish.

(Source: ANN)

In search of a mystical ingredient known as Sky Fish, Meliodas and Hawk stumble upon a spring that suddenly transports them to the Sky Temple: a breathtaking land above the clouds, inhabited by beings called Celestials. Meliodas, however, looks strikingly similar to a local criminal called Solaad, and is imprisoned and shunned as a result. Meanwhile, the kingdom of the Sky Temple prepares to defend the Great Oshiro's seal—said to harbour a three thousand-year-old evil—from the malevolent Six Knights of Black, a group of demons who seek to destroy the seal. However, the Demon Clan is successfully unleashed and terrorizes the land, prompting the remaining Seven Deadly Sins and the Celestials to fight against their wicked foes. 

The battle progresses well, until one of the Six Knights awakens an "Indura of Retribution," an uncontrollable beast from the Demon Realm. With its overwhelming strength and sinister power, the Seven Deadly Sins and Celestial beings must now work together to defeat the creature that threatens their very existence.

[Written by MAL Rewrite]