GRET-50: Giant Heroine Hyper 4 Sisters Annihilation Plan | Full Synopsis and Details
Code: GRET-50
Japanese Title: 巨大ヒロイン ハイパー4姉妹全滅作戦 ヒポリュート星人登場！！
English Title: Giant Heroine Hyper 4 Sisters Annihilation Plan: The Hipolyute Alien Appears!!
Actresses: Kasumi Matumaru (松丸香澄), Kana Hoshi (帆志科南)
Studio: GIGA
Release Date: December 12, 2025
Runtime: ~90 minutes
Genre: Superheroine, Giantess, Sci-Fi, Action, Domination
Plot Summary
In GRET-50, the Hyper 4 Sisters, a team of giant heroines, face their greatest challenge yet when the Hipolyute Alien invades Earth with a sinister plan to annihilate the sisters and conquer the planet. The story follows the four heroines as they use their unique powers to protect humanity, but the Hipolyute Alien’s advanced technology and cunning strategies push them to their limits.
The alien’s plan involves capturing the heroines one by one, subjecting them to intense battles, and ultimately breaking their spirits through SUPER HEROINE INSULT tactics. The heroines are forced into perilous situations, including energy-draining traps and humiliating defeats, testing their resolve and unity as a team. Despite their struggles, the sisters fight back with their Spandexer suits and giant powers, leading to a climactic showdown against the alien invader.
Key Features
- Giant Heroine Action: The film emphasizes the heroines’ towering forms as they battle massive alien forces, showcasing dynamic fight scenes and city-scale destruction.
- Domination and Peril: True to GIGA’s style, the heroines face intense challenges, including physical and psychological domination by the alien antagonist.
- Team Dynamics: The story explores the bond between the four sisters as they work together to overcome their individual weaknesses and unite against a common enemy.
- Sci-Fi Elements: The Hipolyute Alien’s advanced technology and unique abilities add a futuristic and otherworldly dimension to the plot.
Reception and Availability
The film has been well-received by fans of the Giant Heroine genre for its high production value and engaging storyline. It is available in both censored and uncensored versions, with the censored version released by GIGA . The cast, led by Kasumi Matumaru and Kana Hoshi, has been praised for their performances, particularly in the intense action and peril scenes .
