i forgot the name of the manga i read a month ago so im currently finding it to see if theres any updates
the plot is theres a guy that believes that he is a reincarnation of a princess who died and later on he finds out that his whole class is related to that battle (were previously reincarnated) theres some magic and stuff
i know my description is vague but any help is appreciated

Maybe Bokura no Kiseki? I havent read it myself but just remembered the description...

yup its the correct one thx fr yr help