Hana wa Knife o mi ni Matou花はナイフを身にまとう; Hana wa Knife wo Mi ni Matou; Flower is Wearing Knife on Her

From Evil Flowers: Kako Saeki is a senior in high school. She has been modeling and harboring her love for her favorite art teacher, Enjoe. Her heart breaks when she finds out that her love is actually engaged. Now, Kako's innocent love takes a dangerous turn when she finds out who is he engaged to.....