Trapped in a Parallel Dimension with a Different Body!
When Japanese student Hiroshi Kimoto somehow dies, he's offered a chance to be reincarnated and become a real isekai protagonist. But when things go awry, he's reincarnated into the body of a cute girl (much cuter than the cover art)? He has no magical abilities, no useful knowledge, no physical prowess and isn't a very likeable person. If you met him in real life I'm sure you wouldn't like him. Sorry Hiroshi but that's the kind of guy you are. At least he/she is a cute girl now.
So join Hiroshi as the whim of the author and conceit of the plot-I've-vaguely-mapped-out carries this unremarkable, passive protagonist through a bland half-assed fantasy world. What heights will he/she reach? All these questions and more will be answered after the initially steady stream of chapter updates dries up, picks up again and then either races or plods towards the conclusion with regardlessly poor pacing.
Oh also just in case I'll say everybody in this story is over eighteen–over nineteen, actually. Even if there's a newborn, the baby is automatically nineteen