Oh boy, judging from the end of this chapter, and the author's Twitter (especially the tweet that says the last chapter is still a name), sounds like Chapter 13 can really be the last chapter...
Sad to say that the worst thing about this manga is Sensei… She could easily have refused the date, but nope she had to go on it for some reason, then she was acting as a girl head over heels in love the whole time and was clearly okay/ready to kiss with this girl…
And since it looks like next chapter is the last, I wouldnt even be surprised if she actually ended up with this girl instead of Haruka, with how Sensei acted this whole date…
Kind of a stupid monologue, just ask sensei about the truth instead of the slimy shit trying to use blackmail all the time to get her way, also turning the blackmail bit into some comedy is pretty bad.
If the axe thing will be actually true then there is only one good ending here where sensei doesnt end up with anybody and "miss roommate" gets her shit together to fix her family situation.
Best the author can do now is make sensei actually act like an adult and speak up about what's happening.
Eh, bringing up that I like her first is pathetic. Even more so when you're telling the other person to not get close to your crush instead of you yourself trying to get close to your crush.
But what's worse is Sensei doing nothing. She should have reacted when the question why she hid the other girl shoes come up.