The romance simulation game, *The Melody of Love Woven with My Sister*, features players taking on the role of Ayano Shinomiya's older brother. The story follows them as they connect with their sister and other heroines. However, the game was plagued with several issues.

Yuto Shinomiya, the older brother, is often oblivious to his sister's feelings and takes a high-handed approach. As a result, if the story progresses with his sister's affection remaining low, she withdraws into herself and plunges straight into a bad end. Furthermore, many scenarios involve other sub-heroines seeing her as a rival and harassing her, leading to a relentless series of heartbreaking scenes.

Suddenly, I, the player, was reincarnated as Reiji Shirosaki, the unexpected villain in the world of that very game!

As the villain, my fate was supposed to be ruin after attempting to steal Ayano from Yuto... but I absolutely refuse to accept such a future! Drawing on my extensive knowledge of the game, I resolve to live a proper life to avoid the destruction flags. Yet, for some inexplicable reason, Ayano began to develop feelings for me instead of Yuto.