HP: the Little Madman of the Snake Yard

[Spin-off fanfic + past and present lives + dual male protagonists + development] This article comes from a little idea of the author It is not a typical Harry Potter. There may be a lot of personal settings in the article. If you cannot accept it, please do not click in. And don't give advice, the author can write it himself! The lonely soul from another world will eventually be saved, and what saves him is not the light, but the same darkness as him The protagonist is the eldest son of the Potter family (si tai at birth), who was transported by a soul from another world... The timeline is moved back four years CP is Xiaofu with a nose from another world. An article written to satisfy my own xp The deputy CPs include GGAD, Severus (travel to another world) x Snape (narcissus) Due to some force majeure factors, the main text and extras are mixed, please pay attention to the screening. The introduction is too weak, please move to the main text.