Yougen Tennyo

Synopsis

Prince Raziel is the successor to the demon throne, but his interests vary wildly from whatever his father keeps in stock, not to mention actual marriage. When his soon-to-be fiancée turns out to be an angel - a mortal enemy of the demon kind - Raziel takes a liking for the girl and decides to make her his bride, much to Demon King's disapproval. After a heated argument, king promises to approve of their relationship, but only if Raziel manages to bring her back to the demon realm. Clueless on how to begin, prince Raziel joins forces with his ever profit-hungry childhood friend Rosetta and together they embark on a fantastic journey through mystical realms, full of glorious dickings and endless hopes for treasure troves ready to be taken.

In this realm, your future half is revealed through divination, the rest does not seem to matter that much.

In order to reach the heavens above, our duo has to traverse through Hell and obtain four elemental stones, which will allow them to open a magical portal leading to the mortal plane. From there onwards, they will have to pass through the Machine Country and Country of the Beasts, before they reach entrance to heavens. A seemingly simple task, if not for the fact the stones are being kept away within four great towers and each of them is supposedly protected by a powerful guardian. Obviously, the stones themselves contain tremendous powers that allow it's bearer to control the elemental energies and as such, shouldn't ever fall into anyone's hands, especially demon.

No one really knows what lies beyond the mortal gates, but they're confident to push onwards. Such is their fate.