Momonga and Nazarick were transported in the DxD instead of the New World - and hilarity, lewdness - and also gore, psychological tortures and moments of unparalleled geniusness that ensued. That's just it.Also, yes, since this is DxD we are talking about it - this fanfiction contains lemons. On my Patreon though. It's not like those are crucial for plot though - but my Patreon also has other nice things - like chapters ahead of schedule.