Honestly we all are manipulative. We all want to be liked and belong to a groupe specially in middle/high school. So we hive certain parts pf our being. For me, this story is very close to reality and i love it for that !
As for the ending, aafter graduation we have a separation period and they reunite in Uni. An accident happens, Jun feels responsable and takes care of Yohan. And they start their relationship.

This story got me hooked at first but soon my interest got drifting along the way because there are too many push and pull scenes. And I see both are redflags to each other. (don't get me wrong its my own view) Since both the character use people to get back on each other. I feel like the plot is not right for their age. Its really a mind reading battle. So I will let myself be spoiled for the ending than drop this. (Even though the art is really good)