They start watching the movie

Once Alya sat down with a tiny cloud of baby powder escaping her padding, Marinette decided to out the movie on. Things seemed to be okay, though Alya still shifted around a little to become more comfortable, which only drew more attention thanks to the crinkling sounds coming from her diaper. Throughout the movie, Marinette kept sneaking brief glances at Alya to get a look at her diaper, which didn't go unnoticed.

"Is there a reason you keep staring at my butt?" Alya asked bluntly, causing Marinette to take her turn as the blushy one.

"I, uh... w-well... I was just wondering... what does it feel like?" Marinette asked curiously.

Alya sighed and placed a hand on the front of her padding. "I guess it feels like... thicker underwear, to be honest. There's just a lot of cushiony stuff because of... you know..." She explained. "Plus, I guess it isn't that bad to have one of these on to cushion your fall."

Marinette listened, feeling a little more than invested in Alya's description, which Alya wasn't blind to.

"Why are you asking? Do you want to try wearing one too?" Alya asked.