B: The Beginning
In a world powered by advanced technology, crime and action unfold in the archipelagic nation of Cremona. Koku, the protagonist. Keith, the legendary investigator of the royal police force RIS. A mysterious criminal organization. A wide variety of characters race through the fortified city as it is beset by the serial killer, Killer B, and a chain of crimes. (Source: Netflix, edited)
Names
| Original | B: The Beginning (latin) |
|---|---|
| Romaji | B: The Beginning |
| English | B: The Beginning |
| Chinese | B：彼之初 (unknown · via wikidata) |
| Also known as | Perfect Bones · بي: البداية |
Facts
| Format | ONA (net original) · 12 ep · 26 min · 5h total |
|---|---|
| Aired | 2018-03-02 (Winter 2018) |
| Status | FINISHED |
| Studio | Production I.G |
| Source | Original work |
| Origin | Japan (Anime) |
| Genres | ActionMysteryPsychologicalSupernaturalThriller |
| Themes | PoliceCrimeDetectivePrimarily Adult CastFugitiveTerrorismBody HorrorForeignGoreMale Protagonist |
| Streaming | Netflix |
Reception
| Community score | 7.04 / 10 |
|---|---|
| Bayesian score | 7.06 / 10 |
| Composite | 51.4 |
| On lists | 101,737 |
| Favourited | 1,294 (1.3%) |
| Completion | 84.2% |
| Drop rate | 6.0% |
| In backlog | 29.2% |
| Score spread σ | 1.69 |
| MyAnimeList | 7.14 / 10 |
Score distribution
13102332383341,57853,32266,189711,10689,70694,727102,333
Where it places
| Cohort | Value | Tier | Rank |
|---|---|---|---|
| Broadcast season | Winter 2018 | C | 33 of 82 |
| Genre | Thriller | D | 114 of 188 |
| Studio | Production I.G | D | 128 of 250 |
| Year | 2018 | C | 149 of 383 |
| Genre | Psychological | D | 251 of 416 |
| Format | ONA (net original) | C | 323 of 857 |
| Genre | Mystery | D | 351 of 652 |
| Season (all years) | Winter | C | 575 of 1,557 |
| Genre | Supernatural | C | 595 of 1,234 |
| Source material | Original work | C | 600 of 1,732 |
| Era | Late 2010s | C | 701 of 1,863 |
| Length | Single-cour | C | 1,088 of 2,668 |
| Genre | Action | C | 1,215 of 2,765 |
| Origin | Japan | C | 2,724 of 7,157 |
Key staff
| Director | Kazuto Nakazawa, Yoshinobu Yamakawa |
|---|---|
| Series composition | Katsuya Ishida |
| Character design | Kazuto Nakazawa |
| Original creator | Kazuto Nakazawa |
Franchise — B: The Beginning
Related
| Relation | Year | Title |
|---|---|---|
| sequel | 2021 | B: The Beginning: Succession |
| other | — | The Perfect World |
AniList id 21665 · MAL id 32827 · record updated 2026-08-27