Oninagi, Vol. 1

Average schoolgirl Nanami is excited about only one thing - getting
closer to her crush during the new school year. Little does she know
that there's an ancient power running through her veins, which is why
she's being pursued by Tomotaka Onigoroshi, a swordswoman who will stop
at nothing to rid the world of Nanami's presence! But while their
initial confrontation is as hunter and quarry, will Tomotaka's
allegiances shift when Nanami steps up to defend her against an
unexpected opponent?