S-mail is an emotional storytelling game driven by sending and receiving emails.
The full version includes 50,000 words of text, over 40 CG illustrations (variants not included), 8 original music tracks, and 5 different endings. A single playthrough takes approximately 1-2 hours.
The story takes place in 2057, when artificial intelligence technology is mature, in an imaginary modern science fiction future. As the protagonist who has lost your lover for many years, you suddenly receive an unexpected email one day, and then start a life of contacting "her" through email.
"She" looks forward to your every response, and your choices will determine her future.