Inspired by comments from 10 Most Rewatchable Shonen Anime Series, Ranked
Here are a few examples that I know of:
| title | expected | actual |
|---|---|---|
| Frieren | non-shounen (seinen?) | shounen |
| Attack on Titan | seinen | shounen |
| The Apothecary Diaries | shoujo | seinen |
| Umamusume: Cinderella Gray | shounen | seinen |
| 100 Girlfriends | shounen | seinen |
What are other instances of misidentified demographic you have seen?
Quick and dirty definitions of anime demographics:
- shoujo - girls
- shounen - boys
- josei - ladies
- seinen - men


I don’t think that is the appeal of CGDCT shows for the seinen audience. I think the appeal of CGDCT shows for the seinen demographic is the perceived innocence of girls. Not in the sense of “I’m a mindless, hormone-driven beast and want to ravage that innocent girl”, but in the sense of “I’m surrounded by constant anxiety, malice, and selfishness in my day-to-day life, and watching those innocent girls do whatever lets me forget this for 25 minutes”. Girls are generally perceived as nice and free of malice (before I had two of those myself, I thought the same), so that’s why there are no “cute boys doing cute things” shows. The general expectation for a show following boys would be for it to be more raunchy. Compare K-On! to Nijiiro Days, for example.
The appeal of CGDCT is not singular. Innocence is certainly a part of why girls are chosen. But also, it needs to be cute and to most only girls are cute. Neither is the innocence universally applied and there are often not so innocent girls included in the cast. For example Konata in Lucky Star says some really not innocent things yet she is a popular moe character.
In the end, dudes rather looking at girls than at guys is still an important factor I think. Somehow being straight makes you like girls more even if you are not romantically or sexually attracted to those girls.