Well this is totally inspired by pride and prejudice so it tracks that the other Bennet sister which is also inspired by (a retelling from Mary's perspective) Pride and prejudice would seems similar.
I'll also add that it's close to Elinor as well (Sense and Sensibility). Their decisions are similar in the sense of living with decorum and propriety. It's just sending me back on a nostalgia ride and I love it!
You're totally right. I don't know how I missed the similarity with Elinor! Also funny this is the third time today that sense and sensibility has come up. It's a sign to rewatch I think.
After the great depression (The big reset in mangago), I have finally emerged from my dark shell to read this masterpiece once again.
On a side note, "The other Bennet sister" (series) has some similarities with this manhwa.