I think I might be slightly confused, was she purposely playing with the student to lure Nishioka to her? Or was it just a coincidence that she took advantage of?
Saw at least one spelling error and one misplaced word (should be "were you expecting" not "we're" and "This isn't what I want!" not "This isn't what I what!")
She has feelings for whom? I need to know! God damn, now I don't simply have to deal with hentai tropes, no, now I have to deal with sitcom tropes too...
A lonesome uneventful teacher life, eh? Usually not for very long in Hentai.
...I actually wish the girl that ran away also got a bit more action, though, she's kind of cute too. Perhaps a 3P would have been nice, or maybe even in a sequel, if the artist permits one to exist.
Great ending though. Our protagonist certainly is a bit of a simpleton.