This novel's setting is a beast taming world, unlock most beast taming novels it also incorporates having an inner world not solely dedicated to the beast. Each beast tamer awakens a floating island floating in a galactic sea, they can battle each other for resources, they can build armorments and even connect their islands together in an type of alliance.
More information is that, from what I remember, the MC was getting special attention from a teacher I think it may have been the principal, he allowed him to go into a special realm (of fire iirc) to gain resources for his island. This place seemed to be reserved for older members. I don't remember much of the book or how far I got into it but it was translated 2 to 3 years ago and it's not the blessed land or the succubus novel but are very similar.