Responses
No they're arnt ex lovers, we know that Blondie had a fat crush on him in highschool and still does just dosnt want to admin it ,all he dated looked like The Esper ,And maybe the Esper also had a crush on him Let's wait and see the future chapters
At first I thought the guide hate the esper boy, and thought something bad must have happened in highschool... Or maybe they are ex lover... But the actuality the guide just dense .. (=・ω・=)