What makes Love So Sweet by Arashi notable?

The album's title track reached number one on the Oricon charts and was notably featured as the theme song for the popular drama 'Hana Yori Dango'. Its commercial success contributed to Arashi's growing influence in the J-pop scene, helping them become a household name in Japan. Released in 2007, 'Love So Sweet' marked Arashi's rise to mainstream prominence, following their 2004 album 'One'. This single became a defining hit, solidifying their status as leading figures in J-pop during the mid-2000s.