Dragon Quest keeper(bit of a yandere futa HaremX readerx 3 protagonists)

This is a story about a person who died and was reborn as the protagonist of Dragon Quest five and he was given lots of unique powers he was also gender bend but he had the power to still go into his mail form he just can't use this power until he's an adult he also have many other powers he cannot use until he gets passed the childhood arc of Dragon Quest five but this is not just his story this is the story about a boy who got his gender swap who was sent to another world with a smart phone and this is also the story of the father of the Dragon quest keeper who was reborn as a woman and was reincarnated as a humanoid slime the story will have 3 protagonist that will all share a Harem together also one of the 3 protagonist are little bit crazy not straight away in the story but they become a bit of a yandere further on in the story I'll be using many types of Dragon Quest stuff in the story but in the beginning it was mostly use stuff from Dragon Quest five more info about the story you'll be explain in a description before I start the prologue in part one of the book