Convenience combined with vile cruelness are considered to be sins, yet, desire for some. Pleasure detected in pain for others, yet, simply committed. Not only physical, but attacking emotions, this thirsty and greedy desire.
Is this process caused by a true being's wish, or an unfortunate chemical accident?

Rainbow Dash has always been a lively mare, but she has made the biggest mistake of her life. How will she cope with her fairy tale life being snatched away by....... The stallion she has always loved her whole life?

(Partly inspired by Dr Jekyll and Mr Hyde)