Here is a hard-to-swallow pill: Women will not just come to you begging to be your girlfriend. Many people who watch The Angel Next Door Spoils Me Rotten will realize it is pure fantasy, a fantasy pandering to your subconscious need to be taken care of like a child returned to their parents. I'm sorry, men, but the sooner you break the fantasy that a 1-dimensional stereotypically perfect girl will come to be your mother/maid/girlfriend, the sooner you will grow up.
Male fantasy fuel anime like The Angel Next Door Spoils Me Rotten perpetuates a sense of entitlement and can lead to feelings of bitterness and resentment towards ordinary women. It is not helpful or healthy for men to think that women will spoil them. Men need to focus on developing healthy relationships with other people, not on being spoiled by them and setting unrealistic expectations.
The Angel Next Door presents only two characters with identifiable traits: a generic male protagonist named Amane, and Mahiru, a girl similar to Tsukasa from Tonikawa Over the Moon for You. For no good reason, she becomes protective of Amane, but his name does not matter since he is an avatar for the audience. He is so devoid of traits that anyone with a similar fantasy can project onto him. Sometimes, monotonous characters lacking personality can develop and become more fleshed out. As of the third episode, there has yet to be character growth.
Even for those who find this sort of escapism appealing, there's nothing that elevates this above its contemporaries. For a production of this middling caliber, it's no shock there's not much animation, and the background art lacks detail. You'll recognize the generic character designs if you've watched studio Project No. 9's other tv series, such as HigeHiro and Tomozaki-kun. Excluding Inukai-san's Dog, this has the laziest opening and ending visuals I've seen all season. The songs are fine-generic-but the visuals are simply reused footage, panning shots of Mahiru, and slideshow animation.
For anyone who's seen this premise done before, you'll know the generic male fantasy makes for a pretty dull story. All the steps are predictable; Mahiru takes care of Amane in every episode, then they develop feelings for each other. It tries to be simpler than most unbelievable fantasies, which may give the impression that it's classier-there's no comedy, melodrama, or fan service. It's like unsalted chips: Flavorless junk food entertainment.