Shower Curtain is a long cloth that is used during a Shower to prevent water from being sprayed out into the rest of the room and also serves as means of privacy for the bather and are sometimes closed even when the bather is taking a bath instead. Shower curtains are often shown to be somewhat transparent in shower scenes to show a silhouetted shadow of a character who is showering as well. Though some shower curtains are typically plain with a single color, they are seen to come in many different designs such as ones with hearts or polka dots. Shower curtain's aren't completely common in Japanese culture as the average method of household showers are part of the Furo session and would generally only be seen in western style bathrooms or in some communal showers.
A transparent shower curtain is seen with hearts all over it during this scene. It is first seen opened on both sides as Megu Kanzaki is in a Bubble Bath and then afterwards as she then takes a Shower as part of a reversedfuro session.
Romeo is seen having a Shower behind a transparent yellow shower curtain in his hotel room. The curtain is closed at the beginning when he is washing a cat toy in the shower but is opened when Yuri ends up coming in as she was trying to locate a missing cat but instead sees him and the toy making him embarrassed and making his newly wedded wife Juliet mad at him for having a strange woman in the bathroom while he was in the shower.
Bulma Brief has the shower curtain half-closed while she has Shower aboard Oolong's House-Wagon. The shower curtain is pink and slightly transparent as the view gets closer while she is washing her arm at the beginning of the scene.
As Kallen Kozuki takes a Shower, she is behind a yellow shower curtain. After she reaches out to talk on the phone, she accidentally causes the shower curtain to open during the conversation revealing her naked body causing her to be embarrassed.
During Suou Pavlichenko's bath, it is shown that she has a transparent blue shower curtain closed over the Clawfoot Bathtub on the part where she is struggling back and forth as she finds a squirrel is in the bathtub with her.