My Tattooed Childhood Best Friend's Restrictions Are Harsh

In her first year as a professional, Nanase is driven to distraction by her childhood friend Rui, a skilled tattoo artist. Rui's overprotective nature, coupled with his tendency to meddle in her affairs, makes him incredibly controlling. Despite their close living arrangement, which has lasted for five years, they are not romantically involved. Nanase harbors secret feelings for Rui, but has yet to muster the courage to express them due to a personal reason. One day, after learning that the respected female mentor Rui admires at work is a woman, Nanase impulsively visits Rui's workplace.