คณะประสานเสียงเดี่ยว

Missing, extremely new, or very obvious to obtain.

The Chinese title is probably a reference to a suspended magazine of the same name. 独唱团 (English: Party), edited by Han Han, consists of essays, novels, photographs, and comics. The different blessings needed for 2 Resonance Interplays could be likened to the different contents within 独唱团.