Everyone Everyone Friends! - S2.E26

With the Jeweling Festival a success, everyone returns to Japan. Karen has a celebration sleepover and Wakaba notices all the souvenirs she brought back from Sorbett. HoneyCat mention they saw Hariu buying a ring leading to Reflect Moon revealing Hariu and Tamaki's relationship. However it appears Tamaki is reluctant to commit to the proposal because of her work, so the idols decide to come up with a plan to get Tamaki to accept.