19ABEMA7.2(16)

17.3 about a sex

Name: 17.3 about a sex
Director: Ko Kanai
Genre: Drama
Released: 2020-09-17
Rating: 7.2

Drama

Watch Free

We checked 8 streaming services in India on 04 Jun 2026 at 11:37 IST

2020

1 Season

9 Episodes

Ended

About

"The world average age for the first sexual experience... 17.3". Is that early? Late? Seno 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.

#japan#high school#high school student#sex with a minor#japanese high school#high school girl#youth mental health

Cast

Riko Nagase

as Seino Sakura

Ririka Tanabe

as Hara Tsumugi

Shiori Akita

as Minagawa Yuna

Taisuke Niihara

as Hotta Ryusei

Yoshiki Fujieda

as Aoki Kouta

Raizou Ishikawa

as Nitta Takahiro

Sonim

as Shiroyama Nao

Norika Fujiwara

as Seino Aki

Rintaro Mizusawa

as Asahi Yu

Seasons

Season 1

9 episodes2020

Three 17-year-old best friends with differing attitudes toward sex learn to navigate love, intimacy, romance and womanhood in a complicated world.

Episodes

Season 1

See all 9episodes →

Graduation from Virginity at Age 17.3. What do we do now?

Sep 17, 202029m10.0

Sakura grows nervous when her boyfriend invites her to his house. Having no experience with sex, she turns to her friends to help her prepare.

Is having sex really necessary in the first place?

Sep 17, 202025m8.0

Tsumugi gets invited to the movies by a male childhood friend she hasn’t seen since junior high. At the end of the night, she comes to a realization.

Is it bad for girls to have a lot of experience?

Sep 17, 202024m8.0

Yuna excitedly tells Sakura and Tsumugi about her new 26-year-old boyfriend, but when her stomach begins to hurt, they fear that she is pregnant.

Frankly speaking, do girls masturbate?

Sep 24, 202030m9.0

Sakura hears odd sounds coming from her mom's room. She tells her friends about it but is shocked when Yuna suggests her mom is using a vibrator.

Does gender matter when falling in love?

Oct 1, 202026m8.0

Feeling confused about Yu's sexual orientation, Sakura consults Tsumugi and Yuna. Later, she blames herself when rumors about him spread at school.

Is breast size really that important?

Oct 8, 202030m8.0

When Yuna fears her boyfriend is cheating on her with a larger-chested girl, she follows him and is horrified to see him entering a brothel.

Boys, have you ever had a haemorrhage for a week?

Oct 15, 202033m8.0

Tired of her father asking her about her love life, Tsumugi decides to enter a speech contest to win a scholarship and move out as soon as possible.

Dropping out of school due to pregnancy. Why only girls?

Oct 22, 202031m7.0

Sakura worries about her friend Narumi after learning that Ryusei got her pregnant. When Narumi faces expulsion from school, Sakura makes a bold move.

Where does 17.3 about a sex rank today?

17.3 about a sex is #1994 on the CineFlixo Daily Streaming Charts today.

Highest: #1994
Top 10: 0 days
Top 100: 0 days

Watch 17.3 about a sex Online Free — All Episodes in HD

Looking for a place to watch 17.3 about a sex online for free? You've landed on the right page. 17.3 about a sex is a well-rated Japonés drama series from 2020 that you can stream right now on CineFlixo in high quality, no signup required.

About 17.3 about a sex

17.3 about a sex Cast and Characters

The cast features Riko Nagase (as Seino Sakura), Ririka Tanabe (as Hara Tsumugi), Shiori Akita (as Minagawa Yuna), Taisuke Niihara (as Hotta Ryusei), and Yoshiki Fujieda (as Aoki Kouta). Their performances are a major reason 17.3 about a sex has built such a passionate audience.

Where to Watch 17.3 about a sex Online

CineFlixo lets you stream 17.3 about a sex online free, instantly, in HD. There's nothing to install — open the page, hit play, done. Works perfectly on Jio, Airtel, Vi networks across India and on slow mobile data thanks to our adaptive video pipeline.

▶ Watch 17.3 about a sex Now

Why People Are Watching 17.3 about a sex

17.3 about a sex flies under the radar but it deserves your attention. What makes it work is emotional weight that hits where it counts. If you enjoy Japonés storytelling that doesn't follow the same tired beats, this is the kind of show you'll end up recommending to friends.

Frequently Asked Questions about 17.3 about a sex

Where can I watch 17.3 about a sex online for free?

You can watch 17.3 about a sex online free on CineFlixo. Just open the page and hit play — no signup, no subscription, full HD streaming on phone, tablet, or desktop.

How many episodes does 17.3 about a sex have?

17.3 about a sex has 9 episodes across 1 season. All episodes are available to stream right here on CineFlixo.

Is 17.3 about a sex good? What's the rating?

17.3 about a sex holds a 7.2/10 rating based on 16 reviews — well above average.

Who is in the cast of 17.3 about a sex?

The main cast includes Riko Nagase, Ririka Tanabe, Shiori Akita, and Taisuke Niihara, plus a strong supporting ensemble.

Is 17.3 about a sex available in Japonés?

Yes — 17.3 about a sex was originally produced in Japonés and that's the version you'll stream here on CineFlixo. English subtitles are provided when available.

When was 17.3 about a sex released?

17.3 about a sex first aired in 2020.

Do I need an account to watch 17.3 about a sex on CineFlixo?

No. CineFlixo is free and you can watch 17.3 about a sex without creating an account. Sign-up is optional — only useful if you want a personal Watchlist or to comment on episodes.

Similar Series You Might Like

If you enjoyed 17.3 about a sex, check out Aijin Tensei -Sare Tsuma wa Shinda Nochi ni Fukushuu Suru-, Harmony of Mille-Feuille, Is Love Reality Full of Lies?, The Yakuza Boss’s Beloved, and Quartet.

Frequently Asked Questions

Where can I watch 17.3 about a sex for free?

You can watch 17.3 about a sex online for free on CineFlixo. All 9 episodes across 1 season are available to stream in HD without a subscription, signup, or paywall. Just open the show page and press play.

How many seasons and episodes does 17.3 about a sex have?

17.3 about a sex currently has 1 season and a total of 9 episodes. The series status is "Ended", so the episode count may grow as new seasons are released. You can browse the full episode list on CineFlixo and continue watching from where you left off.

What is 17.3 about a sex about?

In which language is 17.3 about a sex originally available?

17.3 about a sex was originally produced in JA. On CineFlixo the show is available in its original JA audio. Check the player options on the watch page for available subtitle tracks.

When was 17.3 about a sex first released?

17.3 about a sex first premiered on September 17, 2020 (2020). The series has since concluded its run.