If you're looking for manga similar to Weiss: An Assassin and White Shaman, you might like these titles.
After the death of a close friend, Tomoe, a former roller skater, joins a famous stunt men troupe, the Green Ship. The head of this troupe, Kazusa, becomes her lover, but Tomoe soon discovers that the Green Ship is a sinister crime organisation and that her dear Kazusa is a cold-hearted killer. A difficult struggle begins for Tomoe, not only against the organisation but to get away from Kazusa, who wants his lover back, dead or alive!
Kaito Yagami is a florist/gardener by day and a hired assassin by night. He kills using poisons from plants to make money to care for his brother who is confined in a hospital.
Akira and Youko are forced to abort their latest mission due to the Covid-19 pandemic and return to Osaka to continue their quiet life as regular civilians but the peace is not to last.
In an organization of professional killers called Thanatos, there exists an elite assassin. Fighting for the ranking of No. 1, the curtain rises on a battle fought with blood over blood!
There is a special organization known as "anonymous" which takes children and raises them without names, without feelings, without souls. Then it sends them out to kill. Can emotions get through to these cold-hearted killers?
Memori Fujieda is not only a university student, he's also the pretty face of his brother's bodyguard company, taking on important cases with ease. But when the mysterious Yuuki Shin comes along, wishing to join the company, Memori finds himself with an unlikely partner – a partner with a dangerous, deadly secret...
The Haiboshi family's line of work is assassination. Takatori, their princess, picks up a boy named Raika who swore to dedicate everything.
Shizuka is a policewoman who loves her silencer more than anything. Back in Japan after an internship in the United States, she is ban from the police. Transferred to the sordid "Security Annex Office", she has to team with a corrupt and pervers coworker. During a trivial investigation, she witnesses an atrocious murder and decides to lead the investigation. She does not know it yet, but she's going ahead to a terrible threat!
Cynthia comes from a family of assassins. She acts as a part-time student who's BALD (she only appears that way), and she continously receives orders from the organization to assassinate people. The story opens with her and two friends going shopping for hair growth solution, when a new mission comes up. Her master, who taught her everything she knew three years back, was hired as the target's bodyguard. The two must fight, but what will the outcome be? Read on!