Yuki is traveling with her best friend Minami. Can she endure the nipple torture that began with Minami's sudden, out-of-the-blue remark...!?
[Character info]
Yuki: She is a university student. Minami is her only friend and best friend. Lately, Minami has been acting strange and it's bothering her.
Minami: She's been a top-tier girl her whole life. She feels at ease when she's with Yuki. Although she has a boyfriend, she's been feeling a bit restless around Yuki lately.