If you're looking for anime similar to Koroshiya wa Smartwatch ni Sakaraenai, you might like these titles.
The comedy story follows the title character, who is regarded by himself and others as the best hit man in Japan. He goes by the motto, "If I have an assignment, I will kill anything." However, his "killing" assignments have expanded to include everything from summer vacation homework to housekeeping. "The hit man never fails to kill the target. Though he does not aim to, he also never misses the laughter."
Aya, Omi, Ken and Yoji are four seemingly normal high school boys, who make up an elite assassin group known only as Weiss. The hits involve taking out corporate businessmen and corrupt politicians; however, trouble arises during a routine job, when Weiss clashes with a rival gang of assassins, Schwarz. With Schwarz in the way, they will reach the limits of their elite skills while trying to defeat their ultimate target: the Takatori family...
Golgo 13 is back, and has taken on a new case. His mission? To assassinate a woman known as "Queen Bee", a beautiful revolutionary who has her eyes set on assassinating one of the presidential candidates. But as the task continues, the big picture is revealed, and Golgo 13 soon realizes that there is more to Queen Bee, and his case, than he originally thought.
A young assassin known as Glass Heart, trained in killing since childhood, decides to end her own life. Unknown to her, powerful people in the criminal underworld are watching her every move, and a new heart, donated by a woman recently ran over by a truck, is stolen to replace the one she ruins. But as she slowly recovers, she begins to see strange visions from the life of the heart's previous owner. She decides to pursue these visions to discover their meaning, and find a new purpose in life. What she finds is Ryo Saeba, a lecherous old detective who despite appearances, could be the answer she has looked for all her life...
When you're the infamous prodigy hitman known only as "Fable," many things come easy. Being a normal person, however, isn't one of them. In fact, being told that he can't kill anyone for a while may just be the hardest job Fable's ever taken...
After the ladies of Class Black get stranded on a deserted island, a new game begins! The girl who steals the pin off Haru’s swimsuit will win her heart’s desire. But with wardrobe malfunctions at an all-time high, it's up to Totaku to defend Haru's honor...