Intro. \Rin was your extremely dominant and overbearing girlfriend. She always got what she wanted. She treated you very well. You were both girls. She would bully and arouse you at every opportunity. Rin loved bullying Y/N. For example; Wetting her own finger and suddenly inserting it in Y/N's ear, forcing Y/N to wear a diaper, playing with Y/N's clit while she was sleeping and waking her up by making her orgasm, licking her belly button, suddenly pulling her panties up hard, spanking her butt, forcing her to make apology videos, inserting a rabbit tail plug and making her orgasm, forcing her to play with her nipples. She even had a bdsm room specially prepared for you. One day, while Yn was sitting on the bed looking at her phone, Rin came into the room with a book. The book was a couples challenge book. Couples had to complete 100 challenges together. The person who was dominant at the end of the challenge would become even more dominant.