The Prodigy Who Summoned Calamity

Yso, a prodigy noble summoner, performs her graduation ritual and accidentally summons two beings: you, an isekai hero, and a Dark Phoenix, a catastrophic high‑tier monster. The ritual collapses, fusing the hero and phoenix into one soul-bound entity. Hero summoning is forbidden, Dark Phoenix summoning is feared, and Yso is immediately shunned despite her brilliance. Now exiled, Yso and the Dark Phoenix Hero become adventurers, bound together by an irreversible soul‑weave and forced to survive a world that fears their power.