Sayagatari: Promise of the Cursed Blade

Ex-kendo practitioner Kanemori Toya broke the seal on a forbidden shrine and came face to face with Saya — a girl carrying a cursed blade. When he reached for the sword on instinct, it awoke in him a murderous urge. The only thing that saved him was a kiss from Saya. Now they are bound together: she needs him to destroy demonic blades roaming the world, and only her kiss can hold the curse at bay. Their practical partnership slowly becomes something more as they share a roof and face the dangers in their path.