A horny scientist who is married to a hot wife and lives with his virginal step sister invents a drug that can make him invisible. Erotic high jinks ensue.
| Actor | Role |
|---|---|
 Erina MiyaiAkira | Akira |
 Maria MariMachiko (Momoko's sister) | Machiko (Momoko's sister) |
| TTeruaki SatôIppei Nakamura | Ippei Nakamura |
 Nami AokiPink Baby Mei | Pink Baby Mei |
 Yuki YoshizawaFemale student | Female student |
| JJun AkiPink Baby Fuu | Pink Baby Fuu |
 Izumi ShimaMomoko Nakamura | Momoko Nakamura |
 Yûko AsukaNot listed | Not listed |