Olympus no Yuubin Post 2 - Hello Messenger
| Volume Title | Olympus no Yuubin Post 2 - Hello Messenger |
| Japanese Volume Title | オリンポスの郵便ポスト2 ハロー・メッセンジャー |
| Light Novel | Olympus no Yuubin Post |
| Publisher | ASCII Media Works |
| Light Novel Label | Dengeki Bunko |
| Author | Mono Tamao |
| Illustrator | Inumachi |
| Target Readership | Male |
| Volume | 2 |
| Release Date | July 07, 2017 |
| Pages | 344 |
| ISBN-10 | 4048932179 |
| ISBN-13 | 978-4048932172 |
| Height (cm) | 14.80 |
| Width (cm) | 10.60 |
| Thickness (cm) | 2.00 |