Loki entered the Yui Clan's estate but found it incredibly hard to move around without being seen, as there were some with enough ability that would be able to detect him if he makes a single mistake. This made Loki focus even more than usual.
Now that he was inside the estate he could sense the presence of at least two people at a rather higher level than the others. Loki had underestimated the ability of this so called Clan. It was then he realized that even though he tried to assess the situation without trying to underestimate his opponents, he was still looking at things in the eyes of the old Fade.
He was no longer the powerful legendary assassin Fade, that could assassinate all even the Gods themselves. Now he was just Loki a rather weak being. Even after he continued to train both physically and spiritually it had only been a few months and he had finally reached a bottleneck.