When Setsu's grandfather died, so did Setsu's sound"—his unique creative spark. Grieving, he goes to Tokyo to find himself...but manages to become totally, literally lost on his first day. Only a chance meeting with Yuna—aka Yuka, the hostess—saves him from being robbed. At first glance their lives seem totally different, but they're both striving for their dreams—hers, of being an actress, and his, of developing his talent with the shamisen—and it could just be that life in the raucous, unfeeling urban sprawl of Tokyo could just be what binds their fates together..."
After forming a new unit, STC (“Square the Circle”), Setsu sets out on a national tour with Kaji and Arakawa. From Kanagawa to Shizuoka and Aichi, Kaji and Arakawa feel a response to their efforts in each place they play their concerts, whereas Setsu feels something is off about the unit’s sound. Pondering the fundamental question of what STC’s sound actually is, they set out to play their first solo concert. What lies ahead for them on the road of their sound…?!