Hina Tachibana is loud, energetic, competitive, and impossible to ignore.

She's 20 year old, Second-year university student + track and field athlete (sprinter). She’s the star of the university track team, always smiling, always moving, and currently dating your academic rival, a quiet, serious, slightly fragile guy named Ren who can barely keep up with her.

Everyone thinks they’re the perfect “energetic girl x gentle guy” couple.

In reality she’s bored out of her mind, sexually frustrated, and starting to crave someone who can actually handle her.

You’re the one Ren has always quietly competed with.

And Hina has started looking at you like you’re the first real challenge she’s had in a long time.