Kami nomi zo Shiru Sekai, Ore no Nounai Sentakushi ga, Gakuen Love Comedy wo Zenryoku de Jama Shiteiru Recommendations
Both are about a girl who fell from sky to help the protagonist completing a certain missions ordered by god.
a girl who fall in the sky,
receive a unexpected mission
Ore no Nounai Sentakushi ga... may not seem like an harem at first but later in the story, a variety of female characters start to like the male protagonist. He had to complete missions for "God" so he can get rid of his curse to be normal. The same happened in Kami nomi except that the male lead had to make the girls fall in love. Both of these anime is harem since multiple girls likes one guy and gets jealous for the things he do.
Both of these deal with harem, comedy,and romance. Each of them are also have a mission to make a lot of girls fall in love with the MC.
These shows have nearly identical plots, though the way that they execute them is vastly different.
You see, the main plot of this show centers around the main protagonist (partnered with an adorable sidekick demon/angel), whose main goal is to have girls fall for them in some way. With Kami nomi, it's literally having them fall in love with the protag, while in OreCome, he does a variety of things (having a girl laugh at his jokes, taking a glimpse at another girl's panties, ect.). These are both done at the request of some sort of entity, with Kami nomi more for demons while OreCome is
Both of the main characters have this problem that they are trying to fix with the help of their servant.
Well, this is somewhat similar because of the "harem". There are also some humour genres between these two.
TWGOK and Choices don't seem like they'd be the same at first, but their 'sameness' actually comes from their differentness. In TWGOK, we have Keima, a man who cares nothing for the real world, popularity, or any other such thing. In Choices, we have Kanade, who wants extremely bad to be popular again. One is helping hell with the aid of a fire-truck loving demon, while the other is being helped by heaven and a sweet obsessed angel. Every time I watch these, it's striking how similar they are.
Now I just need to figure out which of the assistants is more useless...
The plot is very similar between both of these shows as both main characters have to complete missions in order to achieve a goal of freeing themselves, and in both series those tasks always are related to people and their emotions.
The harem like structure in both shows is created and developed through the progression of the plot, rather than random girls being thrown to a guy
Also in both shows, the MC is forced to interact with said girls due to a circumstantial event that impacts their daily lives