Yeahhhh I thought the Todou imaginary flashback was just Todou being stupid and that's all part of his usual routine where he creates fantasies with anyone he makes friendship with.
But the Choso part came out of left field. That part confused me because surely, Yuji is not the dude's brother, right?. If not, then why did Choso have the memory? If they are in fact brothers, then what the heck is even Yuji? So many questions.
I highly recommend reading
Paramnesia by Gentrychild on ao3!
{{ Being Sukuna's vessel is not the strangest thing about Itadori Yuuji. }}
Is he performing memory manipulation when he's in a dangerous situation without him being aware he is doing such? At the Kyoto event, I thought Todou was just being silly making an imaginary flashback like that since he found out that he has the same type in girls like Yuuji, but it happened again on his fight with Choso. DUDE! I need Yuuji's back story