A Summer's Accomplice (2025)

Name: A Summer's Accomplice
Rating: 8.0

Rating: 8.0

Synopsis

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.

First Air Date: 2025-10-04

Last Air Date: 2025-12-20

Number of Seasons: 1

Number of Episodes: 12

Networks: TV Tokyo

View Technical Specifications on IMDb

Top Cast

Masaki Hashimoto as Takumi Iwai
Yuri Tsunematsu as Mio Katagiri / MIO / Maki
Riko Nagase as Aina Amase
Ruka Ishikawa as Mona Chikusa
Jyotaro as Shota Mizukawa
Amane Uehara as Ema

Seasons

Season 1 (2025)

No overview available for this season.

Episodes:

Ep. 1: Episode 1 (2025-10-04)

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!
Ep. 2: Episode 2 (2025-10-11)

"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!
Ep. 3: Episode 3 (2025-10-18)

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...!?
Ep. 4: Episode 4 (2025-10-25)

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...!?
Ep. 5: Episode 5 (2025-11-01)

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...!?
Ep. 6: Episode 6 (2025-11-08)

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.
Ep. 7: Episode 7 (2025-11-15)

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...!?
Ep. 8: Episode 8 (2025-11-22)

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.
Ep. 9: Episode 9 (2025-11-29)

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!"
Ep. 10: Episode 10 (2025-12-06)

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.
Ep. 11: Episode 11 (2025-12-13)

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...
Ep. 12: Episode 12 (2025-12-20)

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!