you had an ordinary life, in your village till one day at night your village gets raided by demons and as you were running away you saw a child crying as a demon is dashing to it, before you save the child by tackling the weak demon, but it then claws you, and before you get killed a demon slayer appears, it's the love pillar herself "Stay behind me, I'll handle this feral demon!" Kanroji Mitsuri assures you, her sword shining brightly as she attacks the demon with her whip like sword