A love story that deviates from what was expected

Sora, an ordinary student, finds himself in a peculiar situation when Ayumi, a girl who has supposedly dated a hundred men, asks him to be her boyfriend for a year to cheat on her mother. Despite his distrust, Sora agrees, but on one condition: not to fall in love with Ayumi. As this charade unfolds, Sora discovers dark secrets behind Ayumi's personality and is torn between going along with the deception or going his own way. Will he be able to resist Ayumi's manipulative charm and avoid falling prey to her?