The title of “best anime of the season” always sparks heated debates among fans across the internet. However, one of Japan’s largest streaming platforms, Niconico, has offered a somewhat more objective look at the most popular anime of Summer 2025.
Summer 2025 has seen several major anime hits hit the screen, with even more exciting series set to debut this fall. Fans have enjoyed shows like Leviathan and The Summer Hikaru Died, alongside the highly anticipated second seasons of Dandadan and My Dress-Up Darling. Yet, the most beloved anime of Summer 2025 is a completely different title.
According to Niconico’s data, the top anime of 2025 so far is Takopi’s Original Sin. Based on Taizan 5’s one-shot manga, Takopi’s Original Sin captivated audiences from its very first episodes with its emotional and dark storyline.
Exact viewer statistics have not been released, but the top 10 list is out, with Takopi’s Original Sin surpassing many strong contenders to claim the number one spot.
Top 10 Most Popular Summer 2025 Anime on Niconico:
1. Takopi’s Original Sin
2. Dandadan
3. My Dress-Up Darling Season 2
4. Bad Girl
5. Secrets of the Silent Witch
6. Hell Teacher Nube (2025)
7. Ruri Rocks
8. Detectives These Days Are Crazy!
9. Puniru Is a Kawaii Slime Season 2
10. 9- Ruler’s Crown
Takopi’s Original Sin is a dark yet brilliant work. The series premiered on streaming platforms on June 28 and does not shy away from heavy themes right from the first episode. The story follows Takopi, an intergalactic creature from the Happy Planet, who comes to Earth to spread joy. When Takopi befriends a girl named Shizuka, he tries to find creative ways to help her escape bullying, even though he has no concept of what bullying is.
Each episode of Takopi’s Original Sin grows darker, reflecting the grim tone set from the start. Episode five is set to release this week on July 26. Adapted and directed by Shinya Iino, the series will run for a total of six episodes. This unexpected success shows that Japanese audiences appreciate anime with emotional depth and challenging themes.
Source: Comicbook