If you're looking for manga similar to K: Seven Stories Movie 2 - SIDE:BLUE ~Sirius~, you might like these titles.
Tells the story of how Fuyuka and Gigelf met, and introduces many characters that later appear in Silent Mobius, including; Rally Cheyenne and Ganossa Maximillian, as well as the relatives of other characters like Yamigumo Razan.
In Chinjuku, the city that never sleeps, there is a psychic senior police officer who has powers beyond human comprehension! His name is Meguru Chojo! Along with his judo expert partner Nao Ippongi, this hilarious duo will keep the streets clean by any means necessary!
The story centers around twin brothers, Arago and Ewan, whose parents were slaughtered by monsters. Years later, the vengeful Arago crosses paths with Ewan, who has since become a police officer, just as blood begins to flow again in the streets of London.
It is the year 2023, 30 years since the time of the Silent Crisis that brought the world to the brink of destruction. In the present, other-dimensional beings known as the Lucifer Hawk are running rampant, and threaten to take over the human world. The only hope for mankind is the AMP -- the Attacked Mystification Police -- a group of women with paranormal abilities who are dedicated to stopping the Hawk at all costs. With the frequency of attacks increasing and the bodies piling up, it's up to Katsumi Liqeuer and the rest of the gang to stop the invading threat... before it's too late.
“Tokko” is the nickname of the Special Public Safety Department in the Second Division of the Special Tactical Police Force Metropolitan Police Department. This special force was established to deal with acts of indiscriminate murder and terrorism, which occur frequently nowadays, as well as unusual crimes with unknown causes. This team is made up of specialists who work to apprehend strange creatures, or “freaks,” known as “phantoms.”
While investigating a series of bombings, Detective Murakami encounters a girl with mysterious powers and no memory. She claims to be able to see and converse with spirits, and then leads him to the next bomb. Due to the accuracy of her prophecies, he can't ignore her abilities, so he names her Maki and they become friends. She approaches him with the pleadings of murdered spirits and he helps arrest the criminals, but what exactly is Maki and why can't she remember her past? Hounded by these questions and the increasing activity of evil spirits, Maki and Murakami search for the answers to their cases while hoping they will reveal Maki's identity.
The sequel to "Babel II" set a few years after Yomi's defeat. This time Babel's enemies are the US military and the CIA, who are interested in using Babel's power for their own nefarious purposes after Babel had given them a sample of his own blood to use for charitable purposes. Not only will Babel be forced to fight against adversaries endowed with his own powers, but he will also not be able to count on the help of his trusted companions, imprisoned in a place where not even his brainwaves can reach them.