Chen Meng Ju Ben Guan

A super rich young miss fell in love with her tutor who disappeared into thin air after her confession. She has been searching for him but in vain until she saw him on an advertisement of his role-playing game. To figure out why he left without saying goodbye, she joined the game, but became imprisoned there unless she gave all the scripts a happy ending as the female lead...

(Source: MangaToon, edited)