Akuyaku no Goreisoku no Dounika Shitai Nichijou- a bl isekai, into I’m not sure if it was a novel or a otome game. A minor weak villain has to learn to be a good boy, to avoid his future death.
To deny the route- a fantasy otome game. A weak but funny character, cursed to always tell the truth, with many possible romantic routes to take (the most similar to stuck in my sisters dating sim imo)
Sweetie, Sweetie, Sweetie- not really a dating game one but hoping into a fantasy novel. Mcs purpose is to make the second male lead have a happy ending
I can see your stats!- mage turned lord, has to date a dragon to stop the destruction of his territory, with heart points that are similar to a dating game.
Zettai BL ni Naru Sekai VS Zettai BL ni Naritakunai Otoko- a guy who knows he’s in bl and does everything to avoid getting matched. Not really in line but a funny read.
NPCs Can Save the World Too!- not really a dating sim, but it is in a game, and the main character really does date many many of the characters. Watch him get used to this new world, while also preparing to stop the incoming war that’ll destroy it.
BL Game no Shujinkou no Otouto de Aru Koto ni Ki ga Tsukimashita- mc is in a bl dating game, in which his brother was the protagonist. Watch him become the left over characters new object of attraction.
Stack Overflow- (spice warning) he gets struck by lighting while in a 18+ game, now in real life he has to raise the love value with hot guys around him by doing the devils tango.
Those are some of the basics, and don’t include the majority of my isekai bl list. Enjoy!!!
They aren’t similar but they are BL with fantasy and or royalty.
The Fallen Duke & the Knight Who Hated Him +18
The Hunter Wants to Live Quietly
I ♂ Took A Trip to an Otome Game (Manga)
The Reader and Protagonist Definitely Have to Be in True Love
(Chinese novel +18)
See You, My King (manhua)
How did I Get the Heroine's Script (Manhua)
Raiding the Vampire Count (Manhua)
Straight "Princess" In the Royal Palace (Manhua)
Kings marker
Monochrome Rumor
I don’t have too many novel options tbh, unless your into quickwear/world hopping?
These are fantasy bl novels, with only one transmigration
Alsar- bl isekai reverse harem
Fairy trap- mc us sick with an illness that makes him sleep more and more. This awakens him to the ability to have an out of body experience. Where he follows a butterfly to a fantasy world, saving a prince who’s about to be assassinated. Does he stay with his abusive family? Or leave them behind and take a new body in this world
A Comfortable Different World Life- mc suddenly wakes up as a child, in a fantasy world where he don’t understand the language. Learn to speak, find out why he’s small, and finally fall in love.
Transmigrated Into the Violent Boss’ Little Mermaid- futuristic fantasy, but fantasy all the same.
Ai o Ataeru Kemono-tachi- also a manga which you’ve probably read
Mob… Sore mo Waki Mob no Hazu Nan Desu Kedo!?- classic in a novel, wanting to avoid the main plot and characters, but he’s just a commoner.
Yonin no Ikemen ni Kyuuai sarete Ore wa Namidamedesu- mc gets isekaied, reverse harem awaits
Dare ga Otome Geemu Dato Itta!- otome game, I’m pretty sure it’s the classic fantasy school setting
The Disabled Tyrant’s Pet Palm Fish- not a western world plot, but I really enjoyed it
And those the novels in my collection without world hopping. Most you can find/read on novel updates
I'll be sure to check those out later! Tqsm I don't mind qt but I have read those a lot and it's not that rare to find it.. but for some reason I always find it hard to find bl nobilities or similar plot (well and I'm quite picky so there's that. I avoided omegaverse and guideverse genre like a plague, and I also dislike older top troupe, and I hate Mary sue or soft or naive or idiotic bottom. My favorite is always those deadpan "''''normal'"""-ish average character lol)
Does anyone have any other recommendations that's similar with this one idm novel or manhwa, I want to read more fantasy/royalty bl that's similar like this lol , I've read "stuck in my sister's dating sim" too btw (I love it)