"Yeon! Ah… I'm back here again."
Looking at the familiar emptiness around him, Leo quickly realized that his time had run out. He was just with her a moment ago, but he was already missing Yeon.
'I need to stay strong.'
However, while he surely wouldn't forget about his promise, he planned to bury aside his only regret for the time being. After all, constantly thinking about it wasn't just something that would give him agony, if his dark thoughts grabbed hold of his weakness once more, he might not be able to pull himself back once more.
At the very least, there was consolation in knowing that Yeon shared his belief in himself and Baekho being one and the same.
He wasn't exactly sure about it back as Arthur, but someone like Yeon would have noticed if the core of Baekho's thoughts had truly changed.