Something felt familiar about the Doki Doki Literature Club soundtrack, but I couldn't place it. Then I heard some doo-wop song waiting in line at the Newport Aquarium and realized: Hey, that's the kind of thing the soundtrack reminds me of.
Also, the very opening sounds of the song sound enough like the opening sounds of "I Don't Want to Set the World On Fire" that I laughed. Apparently that's a precedent of doo-wop rather than being doo-wop.
"Okay, Everyone!" also feels like it matches something in this space, though I don't see the connection yet.
Note: I know ~nothing about music. Maybe what they share is just a common chord progression, key, or beat that is not particular to doo-wop. But it would make sense for a dating sim's soundtrack to have such influences. From Wikipedia:
Lyrics are simple, usually about love, sung by a lead vocal over background vocals, and often featuring, in the bridge, a melodramatically heartfelt recitative addressed to the beloved.
I wonder what other connections there might be.