Anal option. It's the same pose as sex but Anal penetration instead of vaginal.
From the walkthrough :
Have dinner in the evening. Talk to Rachel and give her wine (to get her drunk).
Then after go to her room and choose to sleep with her. H Scene.
Once you do this scene, next time, you can just choose the sleep option again (in the evening) and
you'll then be able to choose the scene again or just sleep with her( no animation just a CG of the MC spooning Rachel with clothes on.
There's also a variation available of the new scene with Rachel. Same pose but vaginal instead of anal.(this opens up once you do the anal scene once)
Both scenes are available once you've done everything you can do with Rachel and Leslie in V0.3.