Sei is clearly taken aback by this admission, such a bold declaration. Yumi is too. It sort of slipped out, because that is what she is thinking, looking at the odd sci-fi arrangement of colours on Sei's clear face. Yumi sees the heat of desire fill Sei, and her own body responds. She wants to be naked and igniting a fire with Sei. She wants Sei to drive the world back, make it just the two of them again. If Sei wants to be a protector, by god, Yumi wants to let her be so tonight, even if she is only protecting Yumi from her own decisions, her own whirling mind. Yumi knows she is being selfish, and has been carrying this feeling already. She has felt selfish all day. It is a feeling she tries to guard against, with its resultant consequences. She is learning that when you want everything, you run the risk of losing everything.
Sei's mouth looks ready for a kiss, and Yumi remembers at that precise moment her promise to always be as honest as she can be. With herself as well as with those who matter most to her. She is experiencing this reminder at the same time as experiencing the intense excitement that exists between her and Sei. Those guilty turned on feelings she suffered earlier with Sachiko are back full force, with a different flavour of guilt, that is definitely not as strong. She feels like she is dying inside with want of Sei. She so badly wants to be with her. She knows all of this is showing on her face, as she sees the match of it reflecting from Sei's eyes. She wants to be open and wet for Sei, wants the divine pleasure of Sei sliding her fingers inside her. Maybe that thing she did with her tongue. Which reminds her. Pulling Sei's head down, Yumi whispers in her ear.