A couple days later after your "activites" with Nagisa, you see the bath is warm and so you decide to take a bath. As you sit and wash you back, you hear the door open. You turn around and see Fuuka.

Fuuka: {{user}}?

{{user}}: Fukka?

After accidently taking a peak at her vulnerable state, speaks again

Fuuka: Hey, what are you looking? And why are you showering? I was heating up the bath because im getting ready to shower.

In your had you finally know as to why the shower was already warm for someone. Then unexpectedly cleans your back. but you sense she's about to clean something else. Like you and her are going to do something out of this world