kaginata:

Daisuga AU: Mr. and Mrs. Smith (Description and Idea Inspired by Niki)

Daichi and Koushi Sawamura are a normal married couple, living a normal life in a normal suburb while working everyday jobs. However, in reality, Daichi and Koushi are skilled assassins working for different firms, both the best in their field, each concealing their real profession from the other. When they both are assigned to kill a man nicknamed “The Small Giant”, they encounter each other on the job and discover the truth.

Ordered to kill each other, they have to decide what to fight for: their career - or their love?