Our Kingdom: Arabian Nights(2005)

Bokura no Oukoku: Arabian Nights

During a trip following a devastating heartbreak, Raoul meets the handsome Arabian prince, Asif! The prince is more radiant than the sun and Raoul finds himself captivated by Asif's beauty. Despite Raoul's vow never to let himself suffer heartbreak again, he wonders if this love is worth breaking his vow over?

(Source: Juné)

Note: contains an extra 4-koma chapter