#rei does not slouch in the presence of his boss but he'll slouch at home/with people he's comfortable with

[oatmealcrisp-freak]

One time after hearing the daycare moms talk about sitting up straight, Kazuki tells Miri to correct her posture and scolds Rei for setting a bad example since he slouches. He has to spend the next 3 days helping Rei process the trauma flashbacks.