Ethan is a high school student living in the man’s world. He is always interested in the parallel universe that has been discovered in the last century. He knows pretty much everything about the parallel universe. He is studying pre-medication in high school. He has met “Chikuuby”, a girl with cat ears, tails and paws who came from the parallel universe by chance. She wasn’t nice to him at first, and was injured. He helped her using his medical knowledge. Now she is very happy to be with him.