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Ai Kikuta, a socially withdrawn office worker, is hit by a truck alongside strangers Kenta Makino and Mutsumi Ogata at a crosswalk. The trio awakens in a dreamlike space, confronted by a floating megaphone that offers them an extra 60 years of life if they agree to shake hands daily. Ai, who has always avoided human connection, is thrown into turmoil by the bizarre “game” and her forced bond with Kenta, an outgoing student, and Mutsumi, a reserved woman. Their daily handshakes spark awkward interactions and unexpected emotional growth, particularly for Ai, as they navigate their intertwined fates. The surreal premise unfolds with humor and heartfelt moments, exploring human relationships against a backdrop of mystery.