Asahi 1-Hon Manzoku Bar Not for Sale Tsuyoshi Kusanagi Collaboration Twin Pen

Asahi Group Foods 1-Honmanzoku Bar Twin Pen (Not for Sale)

I'm a bit fuzzy on when, where, or how I got this, but it's a sweet-smelling twin pen from 1-Honmanzoku Bar featuring an illustration collaboration with Tsuyoshi Kusanagi. It has red and blue ink.
Judging by the text on the pen, I believe it was a novelty item from a campaign to support students preparing for exams.

It has been opened, but it is unused and has only been tested.
It has a very sweet scent that is soothing, so I hope it will be used as a study companion or by fans of Tsuyoshi Kusanagi.