Super Whisper! ~Secret Immoral Sex with Step-Sister Mutsumi Mutsuura Behind Your Family's Back~ [Binaural Recording]

A Super Whisper series first! Sex with an "older sister"!

The entire project was recorded binaurally.
It's a virtual project that meshes the real world and voice-work together!
By using your smartphone or a portable audio player
and listening to this audio work inside your house,
you can enjoy a virtual experience that feels like you are actually living together with your older sister!

Do you want an older step-sister who loves you more than anyone else?
This audio work is for those who could not meet the older sister of their dreams in real life.

What if you were able to meet an older sister who spoils you to no end...?
What if she was willing to do anything for you...?

This project will make those fantasies come true!

Experience a story about nurturing love with your step-sister while keeping your relationship a secret from your family.
The most immoral and lewd story from the Whisper Series.
Please check it out with your own ears!

[Track List] + Finish Timings

track00_ Title Call (01:30)
track01_ If you don't wake up...I'm going to tease you (11:04)
track02_ A secret attack... In the living room (15:46)
track03_ Taking a bath together... It's been a long time (37:41)--> Finish 1st time [33:54]
track04_ Attack at night... Big success! (Smug) (30:37)--> Finish 1st time [16:46] 2nd time [28:31]
track05_ Morning service is...my job as your older sister (24:26)--> Finish 1st time [08:19] 2nd time [21:51]
track06_ I've finally...become one with you (13:00)
track07_ Two siblings... Let's spend an immoral night together (40:19)--> Finish 1st time [10:35] 2nd time [26:26] 3rd time [35:44] 4th [38:36]
track08_ Please take care of me... From now until forever (06:24)

Total playback time: 181 minutes

* The specified finish timings are approximate.
Please be aware that they may vary slightly from the actual timings.