Tokeepapromise Stories

Rin Shirasagi. The adventurous and sarcastic twin sister to Lui Shirasagi himself. When she moves home from France she wasn't ready for the changes that came with it. One of which was a new boy in her life, Shu Kurenai, her brother's sworn enemy. But then she finds herself getting closer to him. What could go wrong? Or even better, what could go right?