If you're looking for manga similar to Manchuria Opium Squad, you might like these titles.
What do you fight for? One takes up arms to survive, another trains oneself for one's own dream, and Kyoko has made herself a bullet for love.
Isamu doesn't stand out, and everyone calls him a "side character" behind his back. Even his passion for running doesn't get him anywhere on the track team, so he spends his nights languishing at a low-paying part-time job. It feels like everything he's holding in is going to boil over, but when people start getting infected with a mysterious illness that turns them into monsters when sexually aroused, he will have to learn how to control the urges he has pent up inside in order to survive.
After sixteen-year-old Ryo Narushima brutally murders his parents, leaving his sister alive, he finds himself at a juvenile facility where numerous horrors await him. Between getting gang raped and tormented at every turn for his crimes, the boy turns to martial arts, taught by the prisoner Kenji Kurotawa, in order to become stronger. Thus begins Ryo’s quest for power, no matter who tries to get in his way.
30,000 years ago, Akuu, the Cursed Child was born during the night of a blood moon. Said to bring calamity upon all, he attempts to fight destiny.
The manga centers on Jōichirō Shishido, a 19-year-old man whose frank honesty has cost him 26 part time jobs. One night, he runs into a group of muscular bodyguards who protect the streets at night, members of a private security firm known as "Tokyo Fist," which ends up changing his life.
Set in the Soviet Union, the mysterious girl named Belka and the quiet boy Shchenok help a Socialist Party member to escape from the secret police. Their aim is to infiltrate into a certain mansion that holds what they seek, but the secret police immediately capture the two. Will they be able to find what they seek and endure the torture of the secret police?
Housen is a painter of erotic art in the Edo period, who stumbles into a murder mystery involving women who have hooked up with one of his patrons. With the help of Tsubaki, a girl he runs into on the street who seems to know more about him than he does and is an artist herself, they start unraveling mysteries involving sex, murder, and occasionally the occult...
Wergelder: in Germanic law, the money paid by a murderer or his family to the victim’s family in atonement. A mysterious deal goes down on a remote island known as a red-light pleasure district. An insane fight between a blonde sniper and an assassin in a Chinese dress brings up questions about who the players are in this deal. A group of misfit yakuza gets caught in the crossfire while trying to get in on the deal, or at least find out what’s being dealt. At the center of it all is a woman who has been wronged in the worst imaginable ways. She will have her revenge.
Six months ago, a massive earthquake sunk a massive Japanese city into the ground, burying it from the outside world. The survivors split themselves into three groups: A, with normal salarymen; B, with criminals and lunatics led by the towering Mad Saurus; and C, an all-female group. However, once food supplies began to dwindle the once-kind men of the A group brutally gang-raped the women of the C group, causing the ladies to seal themselves up deep within the ruins. Now, the A group is working towards digging their way to the surface when they unearth Violence Jack, a massive giant. Though the A group wants Jack to help defend them against the B group, he ultimately chooses to protect the C group against all of the others. A bloody civil war approaches - will anyone escape alive?