Under spoilers because I totally recommend watching the full show
(pictures taken from twitter)
Spoiler
Firstly they had weird fake candles that seemed to detect when she blew? They didn't work well and were kind of awkward but the girls played it off
Katomina gave a sweet speech to her fans and the members surprised Katomina with her baton to show off some skills to her fans as a treat.
She had a cute letter from her mum, seems she did batons since 3rd Year in primary/elementary school and she was pretty passionate about it.
Surprise visit from Imamura-san! The girls were all super excited and very happy to see him(although Katomina was sure it meant something was wrong aha)
They also changed the Encore Version from Sakura no Hanabiratachi to 365 Nichi no Kamihikouki a few performances ago (don't remember the specific date though).
Anju sings Sayanee's solo line in the beginning. (Noepii filled in for her when she was absent).