I feel a bit bad for the kid, but she's already in a relationship. She's enjoying herself and she doesn't lose control despite looking like it (she was able to snap instantly to herself to crack a joke on Mukai sensei's behalf).
It does seem like her being a ghost is not a lie. I hope this doesn't lead to problems further down the line. Also, don't name your kids Sachiko! Always a Sachiko that ends up tragically a ghost.
What in interesting collection of tales. It's not super coherent, but the recurring Yamakawa dude is hilarious. I feel bad for a lot of the girls though, but not as bad as Yamakawa kun.
Think everone's missing the point. He attempted the S&M route, but it ended up backfiring on him. Now he's got what he wanted, but not in the form he desired. Real lesson: Don't be a douche.