Ansatsu Moratorium  

Rin Mikage is not just a schoolgirl but also an exceptional assassin who was born into an assassin clan and follows strict standards. Currently, she faces a challenge as she has been trying to kill Kazuma Konoe, her target and classmate for more than a month without success. Despite being unaware of it herself, the reason for her failure is because she is in love with him. As Rin continues to be charmed by Kazuma, his murder remains delayed. Both of them are oblivious to Rins feelings, but her never-ending assassination attempts bring her closer to Kazumas heart.