OK, now that I can finally read it, is his dad a vampire/dhampir? Why did she call him 'Fatty'?
Is this just going to be a knock-off of Suzumiya Haruhi and the SOS-Dan?
Wacky hyper childhood friend and her normie tsukkomi sidekick solve people's stupid school problems in a blunt fashion. Medium chance of wholesome BS, low chance of drama, low chance of romance.