The Wings of Storm
Tahro Akagi shouldn't live in two worlds at once.
Yet forced to spend his days studying by a no-nonsense mother, he longs for adventure. At a moment of desperation, Tahro finds himself in Saishuu Riku, the lands of his favourite book. Engrossed in this world more than he ever thought possible, Tahro saves a character's life.
But if a butterfly's wings can bring thunderstorms, then his every breath is another flap as it flies, his every heartbeat a danger to those around him.
Unwittingly, he plunges too deep into the conspiracy of a witch biding her time against the continent. When tensions rise between the ministers of Saishuu Riku, and children are kidnapped by a man with butterfly-patterned knives, Tahro knows he's changed the plot too much. Events that should happen don't, and his new friends are caught in a crossfire he wants no part in.
And when his friend is kidnapped, saving her could put everyone else in danger. Yet Tahro can't stand by and watch.
Blurb courtesy of @catlegis.
This was previously titled as The World Changer.