冬木 しのぶ

Shinobu is Itsuki's best friend who does her best to follow-up after Itsuki makes some kind of silly mistake. She is second year student and is the classmate of Itsuki, Shuuji, Aoi and Kouichi. Shinobu is also part of a swimming club but she doesn't swim because she has a poor health so she assists the swimmers in noting their times.

By accident, she saw Shuuji save Itsuki who was with an insistent Senpai who wanted to take her for a ride in the pink district of the city. Seeing Itsuki going to Shuuji in a friendly way, she misunderstands. Very happy that her friend has finally got a boyfriend , she has spread the rumor that "Itsuki and Shuuji go out together".

From time to time she tries to probe onto the two's relationship while making sure they don't break up and thinks that "it's good that Itsuki got a boyfriend".