Don't know if the translation was iffy or not, or just a huge info overload in my head, but I got barely any of what happened in this chapter.. is it just me?
Basically Marybelle (isekai FMC) died and got reincarnated as bigtits (FMC). They realized that, if Delray (isekai MC) got reincarnated as a soul without a body, it must mean that his body may still be alive, but soulless.
With Marybelle here, she can use magic to bring Delray back in time and world just before Marybelle's death, which would mean that Marybelle and Delray will be both body and soul existing in the isekai world and FMC and MC will be both existing in the regular world, which means everyone is happy.
Buuut for some reason Delray woke up with MC's body and no magic powers, instead of having his original body and powers back.