If you could sum up this anime in one word, it would definitely be "onii-chan".

Suzuka Nagami is a student who excels in her studies and is madly in love with her brother (obviously an anime sibling love). One day, a novel about a forbidden love between a little sister and her big brother written by her wins an award and gets a serialization. Suzuka decides to pass her brother off as the writer, since due to her position as student council president it would be inconvenient. From this point on, the fancervice begins.

We'll have the costume/underwear purchase episode, the beach epiode, the summer festival and school festival episode, the sick protagonist episode, the episode where the harem sleeps with the protagonist (that's right, I forgot to mention that the male protagonist has his own female harem of fans), and then end with the epiode at the amusement park.

The problem with this plot is that there is no plot. It is in fact a jumble of tropes with no logical connection, put together just to create fanservice.
The first few episodes are quite enjoyable, but then the situation becomes disastrous.

The main characters are the brother, Yuu Nagami, and the little sister, Suzuka Nagami, both of whom receive incredible characterisation (just kidding). With a lot of imagination we have that the tsundere little sister is madly in love with her brother and tries in every way to make him understand: making him choose her panties, sleeping together, becoming jealous if he even sees a girl other than her, going out on dates. As for the brother, a blind man would see better the signals the little sister sends him.

As secondary characters we have:

• Ahegao W Peace-sensei: a girl who only draws erotic scenes (what can you expect from someone who calls herself Ahegao?);
• Mai Himuro: another writer who becomes a fan of Chikai Towano (Suzuka's pen name) and wants to know his secret to improve her manga;
• Esaka: a little girl who is actually 20 years old and only looks like a child;
• Reika Shinozaki: a perverted editor;
• Sakura Minazuki: a voice actress who calls Yuu onii-chan even though they aren't really siblings;
• Akino and Haruna Kanzaka: twins who only try to get in the way, obviously failing miserably.

Here, too, the rule applies: the more clichés you use, the worse the result.

At this point only one thing could improve the situation, beautiful visuals, but alas here too it is a big no-no. I don't even know how to describe it... it alternates between scenes that are quite well done and... this

There are enough examples to write a whole book: completely wrong proportions, squinting everywhere, and that's just to name a few.

The only thing that surprised me positively was the opening.

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Strangely well done, with a motif that sticks in the mind, obviously cheesy and brightly coloured. It gives you the false hope that you're watching a decent quality show.

Well, what can I say. My expectations weren't very high from the start, let's face it, but this anime still managed to disappoint me. It's not a new theme that of bro-con or sis-con, there are a myriad of identical anime where the situations are always similar, but this one wanted to take a bit too much, indeed everything, resulting in a ridiculous and embarrassing mixture.
If they had been able to dose better what to show and especially how to show it, the result would have been acceptable (let's not exaggerate, it would not have been a masterpiece anyway).