Natsuki Rio CD-ROMs
Some of the CD-ROMs that Rio has appeared in are as follows.
| 1998.01.29 | RadioROM Lunchtime vol. 1 [Win] | movie, image, voice |
| 1998.02.26 | RadioROM Lunchtime vol. 2 [Win] | movie, image, voice |
| 1998.03.26 | RadioROM Lunchtime vol. 3 [Win] | movie, image, voice |
| 1998.04.30 | RadioROM Lunchtime vol. 4 [Win] | movie, image, voice |
| 1998.05.28 | RadioROM Lunchtime vol. 5 [Win] | movie, image, voice |
| 1998.06.28 | RadioROM Lunchtime vol. 6 [Win] | movie, image, voice |
| 1998.07.30 | RadioROM Lunchtime vol. 7 [Win] | movie, image, voice |
| 1998.08.28 | RadioROM Lunchtime vol. 8 [Win] | movie, image, voice |
| 1998.09.28 | RadioROM Lunchtime vol. 9 [Win] | movie, image, voice |
| 1998.10.28 | RadioROM Lunchtime vol. 10 [Win] | movie, image, voice |
| 1998.11.28 | RadioROM Lunchtime vol. 11 [Win] | movie, image, voice |
| 1998.12.28 | RadioROM Lunchtime vol. 12 [Win] | movie, image, voice |