curtain or screen / canopy or tent / headquarters of a general / act (of a play)
幕
=
巾
+
莫
:
Mozart (莫) just had a shower in the space station's bathroom (Ø4), and just wearing a towel (巾) he goes behind a screen (幕) to get dressed. He thinks it is a little weird that Malte Monkey (mu) is in the room at the same time, staring at him without blinking even once.