Beelzebub froze for a moment, never expecting to hear those words. However, he quickly recovered and snorted. "What the hell are you talking about? Did you forget you took the Fragment from Belial last time?"
Roan faintly smiled. Beelzebub's reaction a moment ago was more than proof enough to confirm the twins' suspicions.
When Hyeoumu mentioned that the Underworld Relic might be in the Underworld, they thought about the time Beelzebub was sealed. This Fragment had been gone for so long, and no one knows where it is, just like Beelzebub himself after being sealed.
When Roan asked about the Fragment, he wanted to see Beelzebub's expression. Beelzebub most likely wouldn't be expecting that question. Even though he was sealed and banished, no mentions had been made regarding a Foundation Fragment. Nonetheless, the twins knew Beelzebub was after the Fragments just like them and for a much longer time.
