Looks like we're once again at the part of the manga where I lose track of the story. What is going on? Did the author skip over the culture festival? Why are Komichi's fellow students treating her like royalty? Why does the author make Komichi and Neko look so much alike, and why is Komichi screaming in front of Neko's window while standing barefoot in the snow, risking her health in the process?
Most importantly, where is Erika? I hope her absence doesn't imply some doomed yuri shenanigans.
Barefoot in snow because she climbed out the window to shout she is missing Erika and waiting for her. She doesn't want wet shoe as they are indoor canvas/fabric shoes that would track snow and water into the classroom.
She did the performance at the festival and it was so good she generated a real fan club.
Most likey she did post the video of her confession and kiss with Erika online and is being seen as a source of courage for other students to confess to their crush.
I'm betting on Erika is now doing piano performances again and they are requiring her to take leave of absences from Robai since Robai is to remote to just be travel back and forth to in the same day.