Nobunaga Oda, a 28-year-old middle school social studies teacher, bears the name of the infamous Sengoku-era warlord, sparking whispers of reincarnation due to his direct lineage as a descendant. Though burdened by societal expectations tied to his name, he channels his frustrations into an unconventional hobby: immersive dating sims that let him escape into harem fantasies, all while rigorously upholding professional boundaries in the classroom.

His life shifts irrevocably upon acquiring "Jitsukyu Mitsutada," a sword linked to his ancestor, which awakens his latent ability to summon figures from history plagued by unresolved ties to Nobunaga. The first arrival is Saitō Kichō, a 14-year-old girl from the past who mistakes him for her betrothed. Forced to navigate these chaotic encounters, he dons gloves to curb accidental summonings via artifacts.

The summoned—political brides, concubines like the fiercely possessive Ikoma Kitsuno, and descendants entangled in the warlord’s legacy—project their historical bonds onto him, weaving a tapestry of humor and ethical dilemmas. Kichō’s fervent pursuit of a child clashes with modern sensibilities, while Kitsuno’s jealousy blurs past and present.

Initially tempted to indulge his harem daydreams, Nobunaga grapples with the moral weight of these relationships, especially given the summoned individuals’ ages and displaced histories. His journey culminates in convincing them to confront their regrets and return to their eras, mending fractured timelines.

Whispers of the warlord’s soul lingering within him gain credence through his uncanny resemblance and instinctual decisions, yet his core remains anchored in an earnest, socially awkward ethics. The duality of inherited legacy and mundane reality defines his struggle to reconcile extraordinary power with everyday duty.