Regulus & Remus
Leaving Severus, he continued his mingling. People were curious about his return, but too many were smart enough not to ask directly, while he enjoyed the verbal gymnastics involved. However even he had a limit and needed to stop.
His eyes went to the one person who was a lot more direct, like all Gryffindors were wont to do. He walked toward the man and... kissed him, right on the lips. This would be one way to see if his instincts were correct and he could always excuse it on the toffee. "Honeydukes toffee," he said with a tiny smile as an explanation. "Horrible side effect. Unless it's the right person you're kissing."