Crushing flags and claiming the Villainess

After getting hit by the truck, Luke was reincarnated as a target character in a reverse harem game.

He was supposed to throw away his fiancée—the Villainess—and mindlessly follow the Protagonist.

A side character he was destined to be, however, even if Luke accepts his fate as a side character, he cannot let the Villainess meet with the same dead end.

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Additional tags: No yaoi, no yuri, no NTR. Obsessive character, possessive character, solo-romance, no harem, early romance, possible lemons.