At the end of the year, Bo A released her second Korean mini-album Miracle.
Bo A's second Japanese studio album, Valenti (2003), became her best-selling album, with over 1,249,000 copies sold.
Later that year, she released two Korean albums, Atlantis Princess and the mini-album Shine We Are! The former was the fifth-best-selling South Korean record of the year with around 345,000 units sold; the latter sold around 58,000 units.
Her third Japanese studio album, Love & Honesty (2004) was a musical "change in direction": it contained a rock-dance song ("Rock with You") and "harder" R&B.
The album, which contained R&B and dance songs as well as ballads, debuted at the top of the weekly Oricon charts, making the album her sixth in a row to do so (including one compilation).