Firstly: Is there anyone who knows the raw title? Secondly: Is there anyone who knows more info about this novel? Gakeppuchi Reijou wa Hametsu Kaihi no Tame Last Boss to Kettaku Suru
Mix-matching from the title on the cover, the novel's ori title seems to be this: ハッピーエンドにはさせません！崖っぷち令嬢は破滅回避のためラスボスと結託する Obviously no eng translation (at least in NU). The raw's in syosetu so good luck mtl it: https://ncode.syosetu.com/n5107hw/