Yami-ochi Rasu Bosu Reijou No Osananajimi Ni Tensei Shita. Ore Ga Shindara Bad End Kakutei Na Node Saikyou Ni Natta Kedo, Mou Yami-ochi “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]?, 闇堕ちラスボス令嬢の幼馴染に転生した。俺が死んだらバッドエンド確定なので最強になったけど、もう闇堕ち【ヤンデレ化】してませんか？