Summary of the rest of the chapters I guess....
Turns out pink hair dude got a little crushy crush on blonde boi and lol they kissed oml then got caught by glasses. Pink hair dude confessed to blondie but obviously got rejected so sad. Glasses shocked 'bout the kissing scene he just saw then blondie comforted him then poof they got together *clap* *clap*. Now that they're dating glasses and blondie so lovey-dovey that the whole school knows about 'em and makes blondie's sister resent 'em when she transfered to their school. End of story
Lol cuz normally in forming a demonic contract in manga it's gonna be all serious cliche. But srsly tho I fucking laughed my ass of in the last scene chapter 1