I was reincarnated as a villainess, but my relationship with the heroine is good!

Maekawa Atsushi was reborn into "Tokimeki Academy," a otome game that his younger sister loved. He was reborn as Ninomiya Akari, a villainess character who interferes with the heroine. However, Akari, who was reborn in this world, has maintained a good relationship with the heroine... or rather, she is her childhood friend and best friend. As a result, a route that shouldn't originally exist...?