Danger romantic comedy of a yandere assassin and a sweet, innocent girl!

Sumika, has always been unable to read the atmosphere and has always been kept at a distance from others. One day, she offered a handkerchief to someone fighting on the street, and to her surprise, that person transferred to her new school the next day...?! "I quit my job as an assassin for you. Please fall in love with me.” Her confession, for the first time in her life, was a sign of fear [that her life would be targeted by an organization of assassins].