Sohee wrote:Ahahaha, I was considering "in" too actually but went with on.
It's not my 1st language! /defends
I know! Be that as it may, your English is still better than that of many native speakers.
Sohee wrote:English just sucks in general though.

That argument can be made....

To tell you the truth, even "in a bittersweet spring" seems a bit off to me. "In
the bittersweet spring" is more acceptable to my native
Sprachgefühl. Maybe that's because one would say "in the spring" or "in spring" but never "in a spring" (with reference to the season, that is).