From a certain point of view, nothing in this world is original, everything is born in mutual reference! By this logic, it's not surprising that some anime look very similar. But from the perspective of our audience, we would rather see some unprecedented subjects and imaginative imaginations.

Cabanelli of The Iron City & Attack on Titan
Both anime tell the story of humans living behind walls who, in order to escape threats from monsters, never tire of killing them. And then through something, the protagonist partially has the power of the monsters, and then they use that power against the monsters. It's just that the endings of the two anime go in very different directions.
"Yuna Yuki is a Brave" & "Magical Girl Circle"
Yuki Yuna is a Brave is not about a brutal death in a battle with a witch like in Magical Girl Circle, but about a group of magical girls who fight against ordinary and definitely not witch-type creatures named Vertexes.
Sword Art Online & Hacker Time
Both anime tell the story of "immersion" in the online game world "can not extricate themselves". Due to some special reasons, you can't exit the game after entering the game, so you start an adventure to save the game.
King of Games & Duel Master
Both animations are children's card games, and they can make abstractions come true. Maybe both of these animations were born to help sell cards?
"Sakura-so's Pet Girl" & "Kawai-sho for all of us"
Both anime highlight the charm of dorm life and mysteriously ignore the troublesome challenges of living with him. A relatively normal young man moved into a dormitory dedicated to strange people. Started trying to leave, but ended up falling in love!
"Miss Fairy Fox," "The Dragon Maid of the Kobayashi Family"
Is there a group of anime fans who want to be soothed by a cute fantasy creature? "Lady Fairy Fox">"The Dragon Maid of the Kobayashi Family" are all about the overworked office workers whose homes are invaded by ancient supernatural creatures. Then they cook, clean, etc. in the way of relief.
Crown of Sin & Code Geass Rebel Lulusius
Both anime are about rebellions after the fall of the island nation. A disenfranchised boy gains amazing strength after coming into contact with a girl, and then they use that power to fight against those who oppress.
The Administrator of the Goddess's Dormitory. 》&"Miss Manager of Haruhara Village"
Both anime are about a teenager who moves into a dormitory full of women older than her. Every girl thinks he's the greatest teenager in the world and shows herself to him at every opportunity.
Tokyo Ghoul & Asian
The protagonists of both anime go from humans suddenly becoming monsters lurking in the shadows of their world. They then spend time fleeing the government, dealing with other monsters, and getting involved in a monster-based terrorist organization.
"The List of Shield Warriors" & "Ordinary Professions Make the World's Strongest"
Both anime are about the protagonist being summoned to another world with others, and then they are betrayed by people they trust around, climbing the abyss of despair with the help of their cute girl companions and becoming powerful.