[Nakazawa]
She sees Sayu watch the creep sniff the panties and gets her camera ready.
" Get Your hands off!. These aren't yours. I'd recognize these panties anywhere!I Bought these for.... "
She snags a few shots of Sayu landing a mean right hook on the old guys jaw and him stumbling back, throwing the undies which landed on Yukos' arm. Yuko shuddered and threw them on the ground before snagging a few more shots of the guy running away and Sayu picking up the stuff of the floor.
Glad that Sayu didn't mimick the previous beholder of the sacred item and sniff them she sighed in relief as she took a few more pictures of Sayu picking up the stuff. There was something off but she wasn't sure what it was. She said "I bought these for..." but didn't finish that sentence which sounded suspicious. She saw some pictures of Eri and Sayu placed gingerly on top of the luggage and the bag sealed shut and offered to help.
Grabbing another bag that didn't quite seem to belong to either set she walked back to the bus with Sayumin.
" Hmph... that perv...he had no right going through our stuff. "
She heard as she got on the bus. As she passed Aika with the camera she gave her a subtle high five and as she walked by Sayu she droped the bag next to the seats on the isle. She continued on her way back to the seat assuming that was Sayu's stuff as the cute frilly thong was pink and looked adorable, like something someone very narcissistic and who liked cute stuff would wear. Plus she just assumed Eri wore green undies with lil turtles on them or something

But there was a thought in the back of her mind. That is waaaaaay too much luggage, even for Michige.
Aika Mitsui
"You Know Eri Will Murder You For Holding Her Undies"
"HEY I DIDN'T HOLD THEM, THEY FELLL ON ME! BESIDES I SHOULD MURDER HER FOR LETTING THIS HAPPEN IN THE FIRST PLACE!"
She yelled a little not angry as much as indiferent. She didn't care if Eri found out, she couldn't do anything about it, and if she was angry it was no big deal, she shouldn't have left her thong out there in the first place. she thought. Wait a minute! (she thought)
ERI'S UNDIES! SAYU WAS PICKING UP ERI'S THINGS! SAYU BOUGHT ERI THAT THONG! SAYU HAD SEEN ERI IN THAT THING! OMG SAYU SAW ERI IN A THONG!

WAAAAAIT! HOW DID AIKA KNOW THOSE WERE ERI'S UNLESS?????? OMG! DAAAAAAAAAYUUUUUUUUM! ERI GETS AROUND!!!!!!!! IN A THONG!
Sha fanned herself as she twitched nervously, not used to this kind of occurence........ 'Eri's undies were very soft' she thought quickly followed by ' OH MY GAH! ERI's THONG! I TOUCHED IT! EWWWWWWWWWWWWWWWWWWW SOOOOO CREEPY! I FEEL DIRTY! I NEED A COLD SHOWER! BAD NAKAzAWA! BAD BAD BAAAAAAD YUKO!'
She ignored Aika as she yelled profanities at Sayu, not bothering with getting involved as she wanted to shut out the wrong thoughts that invaded her mind such as 'how did Aika see those undies on Eri'' and what was she doing when she saw her with the GAH I AM DOING IT AGAIN!'..... She mentally beat herself up with a chair and when she was done she noticed the look of fear plastered on Mari's face.
"Hey Mari-chan, wanna come sit with me back here?" She asked nicely, hoping to erase that look of utter fear from the poor girls face.