Question: What are the two nicknames of singer of the theme song for the tv series "Hotel"?
Sentence (from "List of Rage of Bahamut episodes"): For season 2, the first opening theme song is "LET iT END" by SiM while the first ending theme song is "Haikei Goodbye Sayonara" (拝啓グッバイさようなら , lit.
Relevant evidence: No