Ko Eun-ki

In 2028, cartoonist Han Cho becomes obsessed with his neighbor, an assassin named Nana. He professes his love for her but she remains indifferent. By accident Han Cho finds an amnesia-inducing drug which he uses to spike Nana’s drink. With her memory blanked out, Nana is told that she is Han Cho’s girlfriend.

A mild-mannered stamp maker searches for the man who slept with his wife. Disguised as a customer, he approaches the man.