Sometimes a Light Novel Title Is So Good It Sells Itself
NSFW
Source:
When the Introverted Me Got Surrounded by S-Tier Beauties After a Seat Change, a Secret Relationship Began - Chapter 1
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NSFW
Source:
When the Introverted Me Got Surrounded by S-Tier Beauties After a Seat Change, a Secret Relationship Began - Chapter 1
Our protagonist
sfw version
That's basically the premise of Shinju no Nectar.
I hadn't heard of this series before, and thought it would be a silly premise good for a volume or two. Looking it up, its been going for nearly a decade and is in its 20th volume. They are really milking this premise for all its worth.
This makes me want to rewatch Bookseller Honda-san.