Bunch of middle aged men who can't get with women anymore want one of their friends to turn into a young girl, and you expect me not to see exactly where this is headed
Makes sense why Chihaya forgot the person in the train chapter. She didn't technically forget, because they never technically met. It was a different Chihaya altogether.
"14 years age difference, huh? Well, nowadays, it's not that unusual, is it?"
The girl is trouble. What kinda upbringing must you have to act like this at 13.