Outbride: Beauty and the Beasts Vol. 3 (manga)

Humanity as she knew it is gone, but Mashiro is slowly coming to terms with her new reality. She has even warmed slightly to her companions, the four impressive male celestials all set on being the first to procreate with her. As their relationships evolve daily, thanks to their regular kissing (and more) to neutralise the effects of celestigen poisoning, Mashiro must contend with the heavy weight of the task they've asked of her.

Will she be allowed to decide who shares her bed first or will that decision have to be made for her?