Kazuma arrives with aqua of course and I assume the rest arrive with him too since it would be boring otherwise.
So the group is isekai'd to lugunica after they are all together so kazuma has steal already.
Elsa is beaten by kazuma's gimmicks and darkness's solid body but she isn't killed since she is nearly immortal and fast.
But then comes in reinhard who notices the huge explosions so elsa is killed either way.
The gang now live with emilia since kazuma will 100% leech of her and can't leech of reinhard.
They go to roswaald and the onis don't kill them because they don't smell like the witch.
Ongoing shenanigans with kazuma/aqua being lazy but having to work.
Betelgeuse will be hard to kill and this is when all the deaths will start affecting the cast despite themselves not dying.
Kazuma and megumi will be affected the most but the others know how brutal the real world is.
They have some moments and defeat beteguese.
Alliance with julius maybe despite him and kazuma clashing in views so just like subaru though minus not getting his ass beaten to hell.