Vamps being able to influence/charm is pretty common.
Jordan Barnes
'tis but a joke
Jace Bell
We finally broke the wall of the ten chapters lag didn't we? This chapter's from like last month
Luis Robinson
What did Detective-san conclude from the inspection? That his parents pretend that Mahiru died instead of nii-san? Also it's at times like this that the kids being 14 feels real and has an actually creepy weight instead of being your average Japanese placeholder for "younger than actual shakaijin"
Michael Roberts
No, they're acting as if his brother never died, it was literally spelled out for you a couple of chapters ago