
Either J has a clue that the brother may be alive and doesn't want Gunmu to get hurt by knowing that despite being alive he is not there with Gunmu OOOORRRRR he knows the stuff that the brother pulled at the end was WRONG and that Gunmu will not like his memory of his brother to be more tarnished so that's why J isn't telling him anything.
Oh WHAT I WOULD DO to be called 'Good girl' by Luke. Oh but Andrew DESERVED that 'Good boy' from Luke. HE STOPPED WHEN TOLD TO STOP. Green flag green flag green flag green flag.