A Summer's Accomplice
Original title: ひと夏の共犯者
Screenplay
Yûsuke Moriguchi
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.
Seasons
1
Episodes
12
Country
Japan
Status
Ended
Cast
👤
Masaki Hashimoto
Takumi Iwai · 12 eps
Yuri Tsunematsu
Mio Katagiri / MIO / Maki · 12 eps
Riko Nagase
Aina Amase · 12 eps
Ruka Ishikawa
Mona Chikusa · 12 eps
Jyotaro
Shota Mizukawa · 12 eps
👤
Amane Uehara
Ema · 12 eps
Reviews
★★★★★
Log in to rate and review
Log in →
Where to Watch
Not available for streaming yet
Episode Guide
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!
2
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!
3
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...!?
4
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...!?
5
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...!?
6
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.
7
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...!?
8
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.
9
Episode 9
When Mio (Tsunematsu Yuri) wakes up, she sees a man lying next to her covered in blood and panics. Meanwhile, Aina (Nagase Riko) finds out that Mio has another personality, and tells her other personality, Maki, "Give me back Mio, you fake!"
10
Episode 10
Mio (Tsunematsu Yuri) watches a video and regains an important memory about the death of her ex-boyfriend Kaito (Asano Junya). Meanwhile, Takumi (Hashimoto Masaki) gets into an argument with Aina over Mio/Maki. Takumi's feelings for Maki grow stronger.
11
Episode 11
The police finally storm in! Takumi (Hashimoto Masaki) and Maki try to escape on a motorbike, but...!? Meanwhile, Aina explains the whole story at the police station...
12
Episode 12
Takumi and Maki visit the seaside town where Mio was born and raised. The two enjoy a brief moment together, but the police are closing in... What will be the outcome for the two at the end of their escape...?! The final episode is finally here!
Similar
Voice Actor Detective
2021
⭐ 7
Hell is Made of Good Intentions
2025
Tokyo Salad Bowl
2025
⭐ 7.9
Rika: Reverse
2021
⭐ 10
Someone in this town
2024
⭐ 8
Mukou no Hate
2021
⭐ 1
Kakegurui Twin
2021
⭐ 7.3
Scandal Eve
2025
MALICE
2023
⭐ 8.6
Light of My Lion
2024
⭐ 7.6
Hustlin Boy
2024
⭐ 6.9
絶対零度～情報犯罪緊急捜査～
2025
Create your profile for free
Save favorites, rate movies, play trivia games and discover your next favorite movie.
Join free →
