Shinobi, Koi Utsutsu

A 17-year-old girl named Kaede is training to become a ninja at the prestigious Fujiwara Ninja Training Academy. One day, she unintentionally uses a genjutsu known as "Mero-mero Jutsu," causing all nearby males to fall deeply in love with her. To pass her ninja exam, she must choose one of the affected men to train with. The complication arises because all the men she has charmed are among the academy's most popular students.