A passer-by, Shen Er, is mistaken for a childhood sweetheart by the heroine Mary Sue, and a story about a bright future begins.
Seeing this delicate Mary Sue protagonist break into his own world, Shen Er faced an important problem after feeling that she was still a little bit cute despite having a serious case of chuunibyou.
Should she stop Tom from appearing or should she replace the person who should have fallen in love with her?
Even if you are a middle schooler, even if you are tsundere, even if you are a Mary Sue, as long as there is love, I will always like you.
Would you be willing to walk with me as a passerby, even though I shouldn't be your leading man?