Guardian Angel (Osana x Raibaru)

When Raibaru Fumetsu saves Osana Najimi from a man who's stalked her, and planned to do more, Osana's feelings for Taro were overshadowed by a newfound feeling... was this thankfulness for her best friend after Raibaru saved her life? Was it admiration for how well Raibaru handled the man? Or was it something more... ...