Liuli Yue Who Traveled Through Time as a Tutor

Nine girls with different personalities traveled to the world of tutoring because of an agreement they made when they were children. The encounter with the protagonist of the plot, the betrayal of the former friend, the darkening of the boss, the death of the friend {rescued in the end}... Can they overcome all these? This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.