| App Type | demo |
| Full Game | S-mail |
| Release Date | Unknown |
| Developer | S-mail制作组 |
| Publisher | OFF LAB |
| Supported Systems | Windows, Mac |
| Price | Free |
| Required Age | 0+ |
| Support Email | off2lab@gmail.com |
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After the death of your lover May, you suddenly receive a new email: she is back, in the form of AI "M". The lover who "lives" in the mailbox, who is strong and eternal, always online, and always loves you. You just need to send letters to her: your choices will affect her and the story.