Alibi?

Having Sebasitan even asking her to explain further was something Elle had not expected at all. The fact that he felt something was wrong, that something had actually happened made her feel incredibly emotional. She had braced herself for possible negative consequences of her declaration, but she got this instead. Her heart was threatening to burst with emotion until she mentioned Kana's name and his eyes narrowed. 

He seemed to be in doubt that it was really Kana and just that narrowed eyes was enough to make her heart immediately crash and burn in hopelessness. It was happening again. He was making her feel like she was being lifted up to the heavens before being sent crashing to the ground in the very next moment.