She'll Destroy the world if she losses him

Yamiochi Last Boss Reijou no Osananajimi ni Tensei Shita. Ore ga Shindara Bad End Kakutei nanode Saikyou ni Natta kedo, Mou Yamiochi "Yandere-ka" Shitemasen ka? I Reincarnated as the Villainess' Childhood Friend Who Falls into Darkness. If I Die, It's a Guaranteed Bad End, So I Became the Strongest... but hasn't She Already Fallen into Darkness (and Turned Yandere)? #anime #manga #mangas #romanceanime