yuukisakura's manga / #Dropped(67)

Questions/things i don't understand 1.what is the purpose of the magic contract rached made to let izu/yslitt go after his mother death and not allowed to track her down? (seems too convenient of a way simply to make mc live poor life the find out she is richass) 2.why the ML and FL need to fight each other like yelling n all out of nowhere then suddenly reconcile and have blush face scene which i also consider out of nowhere?Like its all too abrupt. 3.what was jerome purpose of having relationships with teryl whiteglass before? Because he seems to be ambitious from beginning and doesn't seem interested in her AT ALL..So why? why not just be with noble more powerful people from beginning? Like seriously.. Seeing no purpose in him being with teryl at beginning of story.. Like this other cheating story is to use the FL position to make his bitch get legitimacy in FL family then dump FL after finish using her.. Like there is motive.. Here i don't understand what is his motive.. It didn't even look like he actually like her in beginning, but then change his mind n thinks power more important.. So whyyyyy