17.3 about a sex is a Japan drama released in 2020 rated 8.2/10 with 9 episodes. This romance series has been watched by 1,752 viewers.
Key Details
| Country |  Japan |
| Genre | RomanceLifeYouth |
| Year | 2020 |
| Episodes | 9 |
| Duration | 00:30:00 |
| Rating | 8.2/10 |
| Director | Kanai Ko |
| Main Cast | Nagase Riko, Tanabe Ririka, Akita Shiori |
| Type | Drama |
| Content Rating | 18+ Restricted (violence & profanity) |
Plot & Analysis
Story Overview
"The world average age for the first sexual experience… 17.3". Is that early? Late? Seino Sakura has a serious personality. Hara Tsumugi has never liked a member of the opposite sex before. Minagawa Yuna is experienced and is currently dating a company employee. At the age of 17, the girl's "sexual values" begin to fluctuate. (Source: TMDb)
Critical Reception
17.3 about a sex has received excellent reviews with a rating of 8.2/10 based on 598 ratings. It is ranked #1,189 in popularity.
Frequently Asked Questions
What is the rating of 17.3 about a sex?
17.3 about a sex has a rating of 8.2/10 based on 598 ratings.
How many episodes does 17.3 about a sex have?
17.3 about a sex has 9 episodes, each approximately 00:30:00 long.
What genre is 17.3 about a sex?
17.3 about a sex is a Romance, Life, Youth drama from Japan.
Who are the main actors in 17.3 about a sex?
The main cast of 17.3 about a sex includes Nagase Riko, Tanabe Ririka, Akita Shiori.
When was 17.3 about a sex released?
17.3 about a sex was released in 2020 in Japan.
Data sourced from publicly available entertainment databases. Last updated: April 13, 2026.