All Shuichi ever dreamed about was following in the footsteps of his pop idol, Ryuichi Sakuma and the band Nittle Grasper. Together with his best friend Hiro, Shuichi's formed a band called Bad Luck and they've even managed to get signed to a major recording label! Unfortunately, the studio deadlines are looming and Shuichi still hasn't finished the lyrics for any of the songs. What he needs is a little inspiration... but he's been running a little low in that department lately. While Hiro recommends finding a girlfriend, fate has other things in store for him...

Tightrope tells the tale of the reluctant heir of a yakuza family and his childhood friend, and follows their love relationship that started budding in their school days and keeps developing slowly but surely.