Anime Like Marriagetoxin

Among the underground, various families have worked in a specialized area of assassination for centuries, leading to their skills becoming so powerful that they are now Masters. Gero is the son of the Poison Masters Clan and skilled in the techniques. However, with his grandmother aging, it is time to think of the future of the clan. Either Gero or his sister must get married and produce an heir.

To save his sister from dissolving her lesbian relationship, Gero endeavors to find someone to spend his life with. Due to his awkwardness with women, he enlists the help of Mei Kinosaki, a marriage swindler, to help him find a wife.

Tarou Sakamoto was a legendary assassin with unmatched prowess. However, five years ago, Tarou Sakamoto disappeared from the criminal underworld.

It turns out that he decided to retire after he fell in love and got married. Now with a wife and young daughter, Sakamoto put on a little weight, works with his wife at a convenience store, and has given up killing under their family rule—absolutely no killing.

However, his peaceful life is threatened when Sakamoto’s old partner, Shin Asakura, comes after him. While he is able to peacefully work things out with Shin, the large bounty that was placed on Sakamoto’s head means that Shin won’t be the only one coming to upend Sakamoto’s peaceful life.

After his family died in a car crash when he was young, Taiyo Asano became increasingly socially inept. Now in high school, the only person he is able to really connect with is his childhood friend, Mutsumi Yozakura. However, one day he discovers that Mutsumi is actually the future head of a family of the world’s strongest spies, despite having no special spy abilities herself.

With her eldest brother ultra-protective of his little sister ever since she got injured as a child, he has marked Taiyo for execution. The only way to survive his lethal spy skills is for Mutsumi to marry Taiyo, thus making him part of the family.

While Taiyo resists at first, he eventually agrees to marry Mutsumi as well as to train to become a world-class spy himself to ensure her protection.

Although a novice bounty hunter, Chateau Dankworth is confident in her skills. However, one day she is overpowered by a man who wasn’t even her target, and worse yet, he takes an immediate romantic interest in her.

She soon learns that the man who continues to pester her is Song Ryang-ha – a former assassin and wanted by the Asian underworld organization he turned against. This leads them to constant run-ins with members from both of their pasts.

Kazuki and Rei are roommates that also work as professional mercenaries while they each flee from their grim memories through the dangerous work.

However, while carrying out an assassination on Christmas Eve, their paths cross with four-year-old Miri who traveled to Tokyo by herself, told by her mother who abandoned her to go find her father. Unfortunately for everyone involved, her father was their mark whom they successfully took out.

Now saddled with a small child, this pair of grown men struggle to adjust to being new parents while also balancing it with their dangerous job.

Juuzou Ogami is a legendary hitman who has never failed an assignment. While on a job, he is stung by a wasp and wakes up as a middle schooler!

Before he can even adjust to the body, his boss gives him new orders—check out this middle school the boss wants to send his daughter to by infiltrating it! Juuzou does as he is told while he waits for his ex-wife to research a cure, but there is only one problem—Juuzou is really awkward around kids.

In order to cut down on crime and terrorism, an organization called Direct Attack was formed. They take orphaned girls and turn them into agents that protect the country in the Lycoris program.

Takina is one gifted agent, but after a hostage situation leads to insubordination, she is transferred out of the main unit to a lower key branch of Lycoris ran out of a cafe.

Despite being paired with a famed, but more easy-going Lycoris prodigy Chisato while there, Takina is determined to get back into DA, but her new partner is determined to prove that there is more to life than just taking lives.

The city of Fukuoka seems pretty normal, but it is awash in dangerous individuals. In the mix is Banba, a detective investigating hitman companies in the area, and Lin, a hitman that is fed up with his lack of jobs.

After being refused pay for a target that killed themselves, Lin is tasked with killing Banba, but instead asks him to team up.

Fumiya Tomozaki is the top player in Japan at a fighting game called TackFam. Despite holding such a title, he is a failure at everything else, blaming it on the unfair rules and mechanics of life.

One day, the second best TackFam player asks to meet up.

Tomozaki discovers that they are actually Aoi, one of the most popular girls at school. She, however, is disappointed that someone she respected is a failure at life.

Now, she aims to teach him how to succeed at the glorious game of life.