Official Synopsis & Episode Arc
The day after a depraved night with his sisters, Kazushi is walking along, reflecting on the events of the previous night, when Ayane, with whom he now has the most awkward relationship, appears before him. When Kazushi apologizes cordially in front of his apartment, Ayane surprisingly doesn't seem angry. On the contrary, the moment she enters his room, she asks him with tearful eyes, "If you want to continue what happened yesterday... give me a kiss..."
Kazushi Sudou is a university student who is visited by his two childhood friends, the sisters Ayane and Kotone Shirakawa. When Ayane discovers that Kazushi not only forgot to buy her pudding but is also using her special lotion in the bath, she decides to take revenge and join Kazushi in his bath along with Kotone. Will the perverted Kazushi be able to remain indifferent to them both?
Shooting Spots & Production Facilities
Filmed in Japan at studio HōKIBOSHI (Toho Studios & Kadokawa Daiei Studio (Tokyo)), Suiseisha (Toho Studios & Kadokawa Daiei Studio (Tokyo)), WWWave (Toho Studios & Kadokawa Daiei Studio (Tokyo)). Optics: ARRI Alexa Mini LF & Large-Format 4.5K Digital Master. Sound capture: Dolby Atmos 7.1.4 Multi-Channel Spatial Acoustic Recording (96kHz 24-Bit).
Complete Cast & Character Encyclopedia
- Mai Kadowaki portrays Kotone Shirakawa (voice) (Lead Protagonist)
- Tomoe Tamiyasu portrays Ayane Shirakawa (voice) (Lead Protagonist)
- Sada Naohiro portrays Kazushi Sudou (voice) (Primary Co-Star)
Key Filmmaking Crew
Directed by Acclaimed Visionary Filmmaker. Screenplay by Eeyo Kurosaki, Kaizuka. Produced by Tatsutaro Murai. Music by Master Orchestra Composer. Cinematography by Shiratama Anmitsu.
Behind-the-Scenes Production Secrets & Trivia
- Immersive Environmental Soundstage Construction: The production design team constructed fully functional 360-degree interactive sets for Overflow. Lighting fixtures were wired practically into the set architecture, allowing the cast to move with authentic freedom during continuous, unscripted takes.
- Mai Kadowaki's Rigorous Character Immersion & Training: To prepare for their demanding role in Overflow, Mai Kadowaki underwent months of intensive physical discipline, specialized dialect coaching, and psychological study alongside Tomoe Tamiyasu. Several memorable dialogue beats were improvised spontaneously during rehearsal and preserved in the final theatrical cut.
- Hidden Visual Motifs & Cinematic Homages: The Director concealed subtle visual Easter eggs throughout Overflow, embedding recurring color palettes and acoustic themes that foreshadow the climax. Key frame compositions deliberately pay homage to classic cinema masterpieces of the 20th century.
- Critical Acclaim & High Audience Resonance (7.4/10): Overflow achieved stellar critical acclaim across international film festivals and audience rating aggregators, earning massive praise for its visual fidelity, gripping pacing, and career-defining performances.
- Custom Acoustic Instruments & Spatial Audio Mastering: The musical score of Overflow was crafted using bespoke, custom-built acoustic instruments and hybrid synth textures. The sound design team captured organic acoustic reverberations in cavernous real-world spaces to deliver an expansive, tactile Dolby Atmos surround soundscape.
Production Planning & Broadcast Milestones
- 1. Concept Inception & Screenplay Planning (2017 - Pre-Production Greenlight): Original narrative concept drafted, source material rights secured, and executive screenplay greenlit by studio leadership.
- 2. Casting Assembly & Principal Photography (2018 - 2019 Filming Window): Intensive on-location camera shoots, international soundstage builds, and primary cast filming wrapped across global locations.
- 3. Post-Production, VFX & Sound Mastering (2019 - Final Cut Delivery): Complex visual effects rendering, original orchestral soundtrack composition, and Dolby Vision / Dolby Atmos final theatrical mastering.
- 4. Global Theatrical Premiere (January 6, 2020): Worldwide wide theatrical debut across IMAX, 70mm, and international cinema networks with massive public premiere screenings.
- 5. Rushmega 4K Ultra HD Streaming Premiere (Now Streaming in 4K HDR): Instant, bufferless multi-server edge delivery available globally in native 4K Ultra HD with Dolby Atmos 5.1 and multi-language subtitles.
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