Natsumi Abe
"Manatsu no Kōsen" was released in May and was a summer tune. It went to number three on the charts, and the sales dropped by half from Memory Seishun no Hikari. Morning Musume's chart position was visibly lagging at the time: their sixth single, "Furusato", only sealed the fact. Natsumi Abe was the only one who sang the melody on "Furusato"; the other members just harmonized discreetly. This was their fifth single, and the sales once again decreased by half.