Hikaru Gero

As the successor to the prestigious assassin house known as the 'Poison Users,' Hikaru Gero possesses unmatched combat ability, yet finds himself completely at a loss when it comes to interacting with women. Determined to shield his younger sister from an arranged marriage forced upon her by their family, he forms an unlikely partnership with marriage fraudster Mio Kinosaki. Guided by his unwavering belief in never causing others misfortune, he simultaneously carries out assassination missions while throwing himself into an unconventional battle on the marriage-hunting front.