When two voices with distinct personalities layer over each other, you can hear crackling ultrasonics — the harmony-focused duo RYTHEM returns to the Billboard Live stage. Last year they celebrated their 20th anniversary, and from a grounded, contemporary perspective they tackle the big question “What is happiness?” delivering their messages from various viewpoints. This year they’ve begun performing live, and since resuming activities in June they have continued their energetic work, including the release of their fifth album Utatabi, their first since the restart. This time, they’ll be joined on stage by a star-studded lineup: arranger and music producer Satoshi Takebe, who produced the March-released “Hoshikaze,” and guitarist Takayuki Sasaki, who participated in the recording and is nicknamed “Kojiro.” Don’t miss this premium night in an intimate club setting.