Oh Boy, Was I Wrong About Her anime poster

Anime Watch Time

How Long Does It Take to Watch Oh Boy, Was I Wrong About Her?

Romaji: Tenkousaki no Seiso Karen na Bishoujo ga, Mukashi Danshi to Omotte Issho ni Asonda Osananajimi datta Ken · Native: 転校先の清楚可憐な美少女が、昔男子と思って一緒に遊んだ幼馴染だった件

Episodes
12
Approx. runtime per episode
24 min
Total watch time
4 hours 48 minutes

Based on the currently available episode data, Oh Boy, Was I Wrong About Her takes about 4 hours 48 minutes to watch across 12 episodes.

Quick Watch Plans

2 episodes/day
6.0 days
5 episodes/day
2.4 days
10 episodes/day
1.2 days

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Oh Boy, Was I Wrong About Her

Oh Boy, Was I Wrong About Her selected.

12 episodes across 1 entry.

Total watch time

4.8 hours

Days required to finish

2.4 days

Episodes included

12

Series vs movies

4.8 hours

Series

0.0 hours

Movies

Based on watching 5 episodes per day at 1x speed.

About Oh Boy, Was I Wrong About Her

Seven years after making a childhood promise to always be friends, Hayato is reunited with his formerly tomboyish pal Haruki at a city high school–only now, Haruki has transformed into the girl every guy dreams about! While Haruki’s looks may have changed, with Hayato, she’s still the same pal he remembers. Despite years apart, their promise and feelings remain and deepen into something stronger.

Series Context

Score

7.12

Year

2026

Format

TV

Source

Light Novel

Status

Currently Airing