Rikako Aikawa

Metropolis is a grand city-state populated by humans and robots, the cohabitants of a strictly segmented society. Amidst the chaos created by anti-robot factions, detective Shunsaku Ban and his sidekick Ken-ichi are searching for rebel scientist Dr. Laughton, to arrest him and encounter his latest creation, Tima, a beautiful young girl.

Two men write anonymously letters to their wives, sure that they're being unfaithful, and are at a loss for what to do when they get replies back.