Reborn in 1983: Why Grind Myself When I Can Grind Others?

Given a second chance in 1983 with a mysterious growth space, our protagonist refuses to fall into the same trap. Why work yourself to the bone when you can leverage everyone around you instead? Armed with future knowledge and a cynical edge, he's done being the model student. Time to turn his classmates, neighbors, and rivals into stepping stones for his own success. In this cutthroat era of reform, it's exploit or be exploited.