Episode 9:

"A school girl?!"
"Did you not expect that?"
"Y-yes ..."

:/
No shirt, Sherlock, people don't expect that a grownass business guy is dating a school girl that's far from 18.

Like, I'm actually fine with such gaps and I think anything that's legal is ok. But the way people in this anime just accept him hitting on her shamelessly is sooo weird. Honestly, wouldn't this be grooming? If not, why not?