[Clopitty clop! This is full of a clopping Rarity and a submissive Rainbow Dash.]

Rarity assumes possession of a paralysed Rainbow Dash, and proceeds to do horribly unspeakable lewd acts, after dressing it up in adorable feminine outfits that Rainbow Dash would normally refuse.

This chapter is mostly buildup, there's no direct clop in there yet. There is, however, some forced feminisation/sissification of poor Dash, and a little bit of mind-breaking.