I'm not sure if it's referencing anything. There's a fair possibility it is and I just don't know it - I definitely have big gaps in my Japanese cultural knowledge - but nonetheless I haven't heard it before. Personally I think it's more likely that they just spontaneously came up with it.Well that was smooth. I really have to try that. Then again, they both spoke at the same wavelength.
@WaveZ_134
Thank you always for the translation. But I'd have to ask, do you by any chance know if this is a metaphor in general, or is it something requires some common knowledge in Japanese metaphor or lit? Like calling saying the moon is beautiful meaning I love you and such.