Honkai: Star Rail: I Fell into the Backrooms and Became March 7th?

This is my first time writing a Honkai: Star Rail fanfic. If anything could be improved, please message me privately.

As usual, our unlucky male lead gets run over by a truck and sent to the Backrooms. When he wakes up, he discovers that the System has given him a new body... March 7th? "I won't turn into a silly airhead, will I?" He has no idea whether it will affect his intelligence, but one thing is certain... I'm gorgeous! "The Host can also transform into other Honkai: Star Rail female characters." "But..." "You have to obtain them through the gacha." "Wait, I have to hit pity even in the Backrooms?" "Well, you can't get them for free..." "..."