I'm not sure specifically as there could be many different stories with this title. It might be about a prince in a reincarnation or isekai setting which is a common theme in light novels.
Power and its implications are also important. He gains certain powers and has to learn how to use them responsibly and also deal with the consequences of having power in a world full of different factions and interests. In this light novel, there are often situations where power can be both a tool for good and a source of trouble.
Some local libraries might also have it. Check with your library's catalogue, either in person or online. If they don't have a physical copy, they might be able to get an e - copy through inter - library loan.
Another option might be 'Overlord'. The story follows a powerful character in a game - like world which has some parallels to the unique situations often found in 'Tensei Ouji wa Daraketai'. For example, the exploration of power dynamics and character growth.
I'm not sure specifically as I haven't read this novel. It might be about a young hero ('shounen yuusha') who is involved in another world ('isekai') in some way related to 'gyuujiru' which might be a special action or concept within the story.
I'm not sure specifically as I haven't read it. But generally, a web novel could be about various things. It might be about a character's journey through their past memories, as 'kako' means past and 'yumemiru' can mean to dream or have dreams about. The 'hiraheishi' might be the main character or a group related to the story.