Brother Conflict Ema's Older Sister Rin Nagami

What if Ema had an older sister. Meet Rin. Ema's older sister. She's three years older then Ema. Rin left with her grandfather when she was three. She was at United Kingdom with her grandfather when she was 14 her grandfather passed away. When she was 16 she became a singer. When she graduated from university she ha...