Hello. I'm looking for a specific manga about a high school girl with weird murderous fetishes (there's a scene where she imagines the bookcases falling on top of a few other students and killing them) and who's frustrated because she feels bored all the time.
One day she finds a phone that a teacher (I don't remember if it's a temporary one or a student teacher or even if it's a new teacher) forgot on class and discovers that he's really into BDSM (mostly, he wants a dominatrix) by reading a conversation on said phone (there's a scene where her heart literally burst out of her chest to illustrate how she basically falls in love with him or maybe with the knowledge that something really exciting is finally happening in her boring life). The teacher arrives and she then blackmails him into letting her into his house and enacting his fantasies.

I know I've read it before so I've searched my reading and completed lists with all the categories I could think of but came up empty handed.

If it rings any bells, please let me know!

Thank you in advance ^^

Satanic Sweet

Quote from IceLettuce

Satanic Sweet

Yup. That's the one.
Thank you very much! ^^