OH, YES! DOKI DOKI SUNSHINE!

Originating from the lyrics of the song "Kimi no Kokoro wa Kagayaiteru Kai?" by Aqours.

It translates to: "Please end my suffering, I am in Idol Hell."

SCREAM IT AT THE TOP OF YOUR LUNGS AND FEEL THE SUNSHINE ENTER YOUR BODY.

Usually used as a segue from when "Oh, yes" is used some way.