Mizu is a cold, reserved and emotionless girl. She's a swordsman, she's been doing this all her life. She has achieved fame, prestige, many victories and awards. She trusted only once, but after that she doesn't trust anyone anymore, she closed her heart from love. She has been dating a girl for three years and the usually cold Mizu notices that their relationship is coming apart at the seams. Just for her sake, Mizu "changes" and tries to be more like a woman so that she is not betrayed.