第 5 集: 解除歌唱禁令後，Riku 的隱藏秘密浮現
2018年1月21日 播出
With the ban on singing and dancing lifted, the boys eagerly resume practicing and performing. However, something's not right with Riku. Iori soon discovers the nature of the secret he's been hiding, but Riku begs him not to tell the others. (Source: Fandom)