Our story begins... in a novel, comic or game that the Protagonist consumed prior to there transgression. Our dear Protagonist thinks that there are laws to being a Main Character, mob, supporting character, second male lead, villain...  ... more>>

There is a quality meta, 4th-wall shenanigans to be had. These are curated titles that are dependent on whether or not our dear protagonists, "they follow self-imposed rules"

(comics) The Stereotypical Life of a Reincarnated Lady, Zettai BL ni Naru Sekai vs. Zettai BL ni Naritakunai Otoko,  Ore ga Otome ge de Kyuuseishu, Inso Law, Heart Throbbing Conquer, I Think I Have Transmigrated Somewhere

(honorable mentions) Beware the Villainess, I'm No Heroine, Resetting Lady <<less

The isekai here is pointed to another world, but not only to the usual Jpn isekai with reincarnation/rebirth/transmigrate MC. It can be the world that's totally not in the earth, and maybe it's not a reincarnation/transmigration and MC is from that world. ... more>>

My ideal isekai novel is the one with the world building as its central theme and the romance is non existent, even if there's romance element in it, usually it's slow and just as unnecessary side dish.

NO HAREM for me. Tho few of them has harem and romance tags, for me there are those that are not romance and harem, so I'll explain in related description instead. 

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