Saikyou Degarashi Ouji no Anyaku Teii Arasoi

Arnold, the seventh Imperial Prince of the Adrasia Empire, is known as "The Insipid Prince" due to his twin brother's brilliance and popularity. Unbeknownst to others, he is SILVER, one of five -SS-rank adventurers in the continent. When his younger brother, Leo, sets his sights on the throne, Arnold works in secret to assist him. A highly attractive woman unexpectedly joins him as an assistant. A hidden power struggle begins.