A Summer's Accomplice
ひと夏の共犯者
We checked 8 streaming services in India on 04 Jun 2026 at 21:43 IST
About
A devoted university student's idol obsession takes a dark turn when he shelters his wounded celebrity crush after her scandalous romance makes headlines, only to uncover her hidden split personality and suspected involvement in a musician's murder—forcing him to choose between love and truth in a dangerous descent into twisted loyalty.
Cast
Seasons
Episodes
Season 1
Episode 1
Living together with your favorite idol is like a dream... But she might be a murderer!? A suspenseful love story begins, featuring a man falling into a phantom love and a dangerous, heartbreaking escape!
Episode 2
"My beloved idol might be the murderer..." What's more, she has another personality inside her... A suspenseful love story about a man who becomes an accomplice and falls into depravity!
Episode 3
Takumi (Hashimoto Masaki) and Mio (Tsunematsu Yuri) are shocked by the arrival of Mona (Ishikawa Ruka), Takumi's childhood friend. They enjoy a fun time at the festival, but at the same time, Mio's disappearance causes a stir in the world...!?
Episode 4
When Maki (Tsunematsu Yuri) asks him a question, Takumi (Hashimoto Masaki) decides to kill his childhood friend Mona (Ishikawa Ruka). He recalls memories from his childhood and is heartbroken, but...!?
Episode 5
Takumi (Hashimoto Masaki) is visited by his classmate Mizukawa (Jotaro), Mio (Tsunematsu Yuri), and Mona (Ishikawa Ruka), who enjoy a brief summer together by playing in the river and watching fireworks. However, the police are steadily closing in on them...!?
Episode 6
Another personality, Maki, begins to tell Mio (Tsunematsu Yuri) about her tragic past. Takumi (Hashimoto Masaki) decides to go to Tokyo alone to carry out the tasks Maki left undone.
Episode 7
Takumi (Hashimoto Masaki) has come to Tokyo to retrieve evidence. Mio's (Tsunematsu Yuri) disappearance has caused a big stir in Tokyo, and after meeting his mother at her home, Takumi's heart wavers and he makes a decision. Then, Sajima receives a new visitor...!?
Episode 8
Takumi (Hashimoto Masaki) gradually begins to feel attracted to Maki, who lives with the sadness of Mio (Tsunematsu Yuri). Meanwhile, Miyake (Masaki Reiya), a detective pursuing Mio, happens to cross paths with Maki deep in the mountains.
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Watch A Summer's Accomplice Online Free — All Episodes in HD
If you've been searching for A Summer's Accomplice all episodes in HD, CineFlixo has you covered. This highly acclaimed Japonés mystery title from 2025 is available to stream instantly — no ads to fight through, no paid subscriptions, no annoying redirects.
About A Summer's Accomplice
A devoted university student's idol obsession takes a dark turn when he shelters his wounded celebrity crush after her scandalous romance makes headlines, only to uncover her hidden split personality and suspected involvement in a musician's murder—forcing him to choose between love and truth in a dangerous descent into twisted loyalty. Across 1 season and 12 episodes, originally airing on TV Tokyo.
A Summer's Accomplice Cast and Characters
The cast features Masaki Hashimoto (as Takumi Iwai), Yuri Tsunematsu (as Mio Katagiri / MIO / Maki), Riko Nagase (as Aina Amase), Ruka Ishikawa (as Mona Chikusa), and Jyotaro (as Shota Mizukawa). Their performances are a major reason A Summer's Accomplice has built such a passionate audience.
Where to Watch A Summer's Accomplice Online
Want to watch A Summer's Accomplice online without paying? CineFlixo is the easiest way. Click play and the series starts in seconds. No popups, no "5 day trial that auto-charges" — just the show.
▶ Watch A Summer's Accomplice NowWhy People Are Watching A Summer's Accomplice
There's a reason A Summer's Accomplice keeps showing up on "must-watch" lists. What makes it work is tight pacing that earns its twists. 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 A Summer's Accomplice
Where can I watch A Summer's Accomplice online for free?
You can watch A Summer's Accomplice 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 A Summer's Accomplice have?
A Summer's Accomplice has 12 episodes across 1 season. All episodes are available to stream right here on CineFlixo.
Is A Summer's Accomplice good? What's the rating?
A Summer's Accomplice holds a 8.0/10 rating based on 1 reviews — genuinely excellent.
Who is in the cast of A Summer's Accomplice?
The main cast includes Masaki Hashimoto, Yuri Tsunematsu, Riko Nagase, and Ruka Ishikawa, plus a strong supporting ensemble.
Is A Summer's Accomplice available in Japonés?
Yes — A Summer's Accomplice was originally produced in Japonés and that's the version you'll stream here on CineFlixo. English subtitles are provided when available.
When was A Summer's Accomplice released?
A Summer's Accomplice first aired in 2025.
Do I need an account to watch A Summer's Accomplice on CineFlixo?
No. CineFlixo is free and you can watch A Summer's Accomplice 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 A Summer's Accomplice, check out Mieruko-chan, My Home Hero, Class of Cheaters, For the Kid I Saw In My Dreams, and Kakegurui Twin.
Frequently Asked Questions
Where can I watch A Summer's Accomplice for free?
You can watch A Summer's Accomplice online for free on CineFlixo. All 12 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 A Summer's Accomplice have?
A Summer's Accomplice currently has 1 season and a total of 12 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 A Summer's Accomplice about?
A devoted university student's idol obsession takes a dark turn when he shelters his wounded celebrity crush after her scandalous romance makes headlines, only to uncover her hidden split personality and suspected involvement in a musician's murder—forcing him to choose between love and truth in a dangerous descent… It belongs to the Mystery genre.
In which language is A Summer's Accomplice originally available?
A Summer's Accomplice 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 A Summer's Accomplice first released?
A Summer's Accomplice first premiered on October 4, 2025 (2025). The series has since concluded its run.
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