The story might revolve around a protagonist who becomes involved with a heroine or a character who transforms into a powerful being, possibly using technology or magical means. The plot could explore themes of identity, power, and the responsibilities that come with being a hero.
Download: The Heroine of Justice Transforms into... Me...
Unfortunately, I couldn't find a detailed plot summary without spoilers. However, based on the title and genre, here's a general idea of what you might expect:
Download: Seigi no Henshin Heroine ga Ore o Mita...