Iwanuma Rin

One of the girls who used to play a lot when Ayumi was young.
She used to be very lively and tomboy-ish.
Now that everyone is reunited, for an unknown reason, she is now looked very weak and extremely timid.
Her Breasts are big but the Nipples are Inverted.
She has a little complex over this matter.

"O-Okay... I'll just... Agree if everyone Agrees."

From the official website