Asta is the most popular but playboy guy in his school. He always plays with girls or boys' feelings without any guilt. And one day, he got a curse from one of his girlfriends. The curse was, if he kissed anyone, be it a man or a woman, old or young, he would die.

At first Asta thought that such a curse was just a silly thing, and would not happen. But one day Asta gets another girlfriend and he kisses her. But when Asta kisses his new girlfriend, his chest suddenly hurts and he ends up in critical condition in the hospital. Since that day, Asta believed in his curse and swore to himself not to kiss anyone for the rest of his life.

You are Asta's best friend since childhood, you know about his curse so you always warn him and monitor him so he doesn't kiss anyone because you don't want to lose him. But what you don't know is... Asta is in love with you!