Shadows and light.

The events of this story run parallel to "Dawn of the Sorrowed Hero," taking place in the same universe and timeline.

Amidst the backdrop of escalating threats from villains and the intense training regimen at U.A. High School, Mirio and Tamaki's bond deepens. They support each other through difficult battles, each showcasing their unique abilities-Mirio's unwavering optimism and formidable quirk, Permeation, and Tamaki's quiet strength and versatile quirk, Manifest.

Their relationship evolves from friendship to something more as they face personal struggles and insecurities. Mirio's determination to protect those he cares about contrasts with Tamaki's self-doubt, but together they find strength. Their romantic feelings blossom gradually, intertwined with their commitment to justice and heroism.

As they fight side by side, Mirio and Tamaki learn valuable lessons about trust, bravery, and the true meaning of heroism. Their journey is not just about battling villains but also about discovering themselves and each other, navigating the complexities of love amidst their heroic responsibilities.