I started reading Oshi no Ko around 2 years ago but dropped it after a few chapters as I wasn't very interested. Not too long ago the anime came out and the first season just finished so I thought I'd share my opinion on it. It's gonna be a fairly short review and will include SPOILERS.
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Starting off with what I liked: The first episode was great, no doubt about that. It's pretty much an entire movie on its own with two completely different types of characters being reborn as the daughter / son of the idol Hoshino Ai which they both adored in their past lives. The premise is really original and interesting, the characters are all pretty unique and the ending definitely left me wanting more. I really liked Hoshino in particular as a character, seeing her try her best as both a mother and entertainer / idol and getting an insight into the whole industry, while also watching Aqua and Ruby growing up was really enjoyable. The art and animation are also above average. Some scenes definitely look better than others, but overall the show is really nice to look at.
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Now the things I didn't like: To put things into perspective, I pretty much only really liked ep 1, 6 and 11. Everything in between just didn't seem interesting or important enough for me to truly care about and I'll get into why that is. Firstly, I just don't think the characters are that great. Aqua has pretty much no character development after ep 1, Kana is a super stereotypical tsundere and the rest, including Ruby just aren't that well written or have anything going for them to set them apart from the rest.
Secondly, the humor. It's just not funny. I laughed maybe once or twice during the entire show and that's because it caught me off-guard (like Aqua suddenly starting to dance in the last episode). The rest is just incredibly stale anime humor that's been done 100 times before, or just really badly timed jokes that ruin the atmosphere. The fact that it's written by the same author as Kaguya-sama is really noticeable in some scenes, because as soon as he tries to write anything serious, he feels the need to put in some completely unnecessary joke for no reason. This also ties into my other complaint, as the serious parts of the show fail to have much of an impact on me because of that.
It feels like Oshi No Ko occasionally just forgets what kind of show it's trying to be. On one hand it's about Aqua trying to get revenge on whoever killed his mother and on the other hand it's about Kana / Ruby finding their place in the entertainment business. And then somewhere in-between it's also a romance / love-triangle I don't even know... It's also just really melodramatic most of the time which creates this weird contrast between being a comedy- and a serious revenge anime.
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In the end I did enjoy some parts of Oshi No Ko and I do think it's a slightly above average show, but I simply fail to see the hype around it. Maybe it's the fact that it has both male and female main characters which both sides can relate to or simply that there's just nothing better to watch currently, I genuinely have to idea.
