Shin'hama Leon kicked off her debut EP era with a celebration at Lazona Kawasaki Plaza in Kanagawa, drawing 1,500 fans to the event on April 15. The EP, titled "New Beginning," dropped the same day, marking a significant milestone for the veteran vocalist who's known for her powerful delivery and signature "膝スラ" (knee slide) move.

The setlist opened with "全てあげよう" (Give It All), a 2024 single produced by Noritake Kinashi with lyrics and composition by Tokoro Joji. Leon followed with "Fun! Fun! Fun!" from last year, where fans joined in the "WAKIWAKIダンス" during the chorus. The real highlight came when Kocchi no Kento took the stage as a special guest.

Kocchi no Kento, who wrote and composed the EP's lead single "LOVE しない?" (Won't You Love?), shared the behind-the-scenes creative process with Leon. When asked what he prioritized during production, Kento revealed he focused on imagining how the live audience would react—a fan-first approach that resonated with the crowd. The two performers, who deepened their friendship after appearing together at the 2024 NHK Kohaku Uta Gassen, showed genuine chemistry throughout their conversation.

Leon expressed heartfelt gratitude for Kento's songwriting contribution, prompting a playful response in "Leon-speak"—Kento joked back with "感謝感激雨あらレオン" (a playful pun on Leon's name), drawing warm laughter from the audience and even surprising Leon herself.

The event concluded with a two-song collaboration featuring Kento's "はいよろこんで" and the EP's title track "LOVE しない?". The pair's synchronized performance left fans thoroughly charmed. For Leon, this EP represents another chapter in a career that's already included a Japan Record Award newcomer prize, viral TikTok moments, and high-profile collaborations with major entertainment figures.