|Spoiler Warning: Plot details, ending details, or both are in the text which follows.|
Five Sugars is the eighteenth episode of the anime.
After being interrogated by the police regarding the fire in the Turkish district, Nina meets with Mr. Rosso, who picks her up from the police station. They go for dinner and Nina notes that Rosso still adds five spoonfuls of sugar to his coffee.
Nina remembers when she was hired by Rosso to work at his Italian restaurant. Nina's beauty and enthusiasm attracted a lot of customers to the restaurant who packed the place. Nina tells Rosso that she practices shooting during her free time. Back then, Nina used the name Anna to cover her identity.
Back to the present, Nina explains to Rosso that she found out he was a contract killer and she thought he could train him to find and kill Johan. Rosso tells he retired after a job when he was hired to kill a man; Rosso saw the man also put five spoonfuls of sugar to his coffee, this triggered something inside him and decided not to shoot.
Nina and Rosso go the the train station, where Nina tells Rosso she has to leave to go in a chase after Johan.
- Rosso: "Killing people is easy. Just forget the taste of sugar"
- Summertime, the film that makes Rosso cry and that is playing in the theater, is, indeed, a 1955 film directed by David Lean and starring Katharine Hepburn, Rossano Brazzi, Darren McGavin, and Isa Miranda. The story is about a lonely American woman who unexpectedly finds romance in Venice.
- When training Nina to cook a pasta dish, Rosso tells her that pasta is not a pasta unless you can taste every ingredient you put in.