The phrase "obverse side" refers to the front or the side that is facing forward. It is the opposite of the "reverse side," which is the back or the side that is facing away. Full definition
The obverse side of this economic problem is a moral one, for it relates to power — who has it and who doesn't — and to the axioms behind present power relationships. (religion-online.org)
Real guilt is the obverse side of the dignity of freedom. (religion-online.org)
On the obverse side of the same coin are the character traits that often make his films worthwhile. (slantmagazine.com)