Woke Up In a Novel! Now the Three Ml's Won't Leave Me. Alone!?

​⚠️ CRIMSON/ART CREDIT: Cover illustration is NOT mine. All rights and credits belong to the original creator/artist.

In my past life, I was a legendary S-class assassin. But after a fatal betrayal, I woke up reincarnated in a fantasy empire inside the body of a frail, sickly noble boy who looks like he’d shatter if the wind blew a little too hard.
well my goal is simple! : survive, find the real MC, and make. the three ml's fall for her,
but nope! they did not make it easy! for some reason God send me a talking rabbit who was supposed to help me by the way! and instead of successfully making the three fall for her.... I was the one they proposed to? wait !what?
(I'm bad at making description (ノ-_-)ノ~┻━┻ forgive me)

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