Meikyuu Yaburi no Hananusubito

Meikyuu Yaburi no Hananusubito summary:

Arisawa Kei’s life seems rather bleak until she notices a strange man staring at her on the way to school. Hakamada Ryuuhei, an En specialist who can see and tie or cut threads of fate, tells her that she has “death-bringer” threads on her hands. But what does that mean to Kei, who doesn’t believe in En or luck?