i don particularly think it's a bad thing his ex manager was also smone who had played the piece b4. heejae has a traumatic scar of hving being left alone n we can see the result of tht through his aggression, dishonesty etc. but after wat left him so mentally scarred to act bring up the courage to give music that he composed, played by the one person he once lost, to smone again (garam) is imo even more huge and rly shows how much he loves n adores garam. the silhouette of the manager in last panel i think rather has a positive symbolism, in a way it feels sort of indicates heejae's redemption methinks. what he messed up w the past guy he's trying not to make the same mistakes again (like in tht ch garam was abt to leave n heejae stopped him to not repeat wat happened b4)
i sense garam has a praise kink hhegehr need heejae to call garam a good boy