LEVEL E

Tsutsui Yukitaka was a freshman who had just entered a high school, and he was hoped to be a good baseball player. When he moved to a new apartment, there was a man in the room. He said he was an alien and lost his memory. Actually, he was the first prince of Planet Dogra, and he was the man who had the best brain and the worst nature. — Description from AniList community (anilist.co).