This reminds me of Yurika no Campus Life, it has a similar basic premise: dumbass straight female MC learns to become a womanizer for her own benefit, hilarity ensues.
It's bi at best and at worst it's just a straight woman being forced to have sex with women (she still has a ton of male lovers off-screen while all this "seducing" going) to avoid getting her head chop off.
If that's what get your rock off go ahead, it's a nah from me.
it's VERY CLEAR the author got inspiration from Re:Zero lolz I like how engaging the first chapter. especially on how Marie want to avoid her bad end, whatever she have to do. even she want to seduce all the women around her who might aim for her life. this lead to yuri story. what a new and interesting way to write yuri story