Remus waited only long enough to dispose of the gifts before excusing himself under the pretence of getting ready for his first class. He really didn't give a damn what the rest of the staff thought, or the fact many of them were still snickering over his reactions, even if they didn't know the gifts that had triggered them. He summoned a house elf to take the gifts back to his rooms (except the one from James and Sirius, that he banished there himself) and followed his nose, literally, in the direction his lover had gone.
It was a very good thing Marlene did not work or reside at the school or he'd murder her for this. He had never heard that particular tone of voice directed at him and he really had no desire to hear it again.
Thankfully, Regulus didn't have too much of a head start and the corridor where Remus found him was empty.