She-Ra and The Power of Grayskull

At age fifteen, Adora and Catra train in the Fright Zone. Until a portal opens, dropping a boy. He had a case of amnesia but remembered his name, Y/n L/n. Shadow Weaver enlists the boy and was surprised by the boy's skill in combat, as well as Catra and Adora. After two years, the girls gain feelings for Y/n and vise versa. Yet Y/n's memories of his past still alluded him. Unknown to him, a sword appeared hundreds of years ago in Bright Moon. Through a portal that was similar to the one he came through.

(This is an He-Man male reader x She-Ra Harem story. Characters will be made to be age appropriate. For season one, they will be seventeen. The age will go up by season. You won't gain the powers of He-Man till the end of season one.)