I have super plane

From his early age, Richard had heard a voice of woman in his head, which helped him in several occasions. At age of 16, on his birthday, he found himself in a strange plane, as well met the owner of voice Nivia. Inside the academy, he met a maid, who was demigod in her past life. As he grows stronger, and explore the world, he receives a mysterious summon, which unveiled several mysteries as well as answered a lot of questions. Chapters will be uploaded on each alternative days.