Tenkorin Okakura is a high school student dreaming of effortless artistic success, preferring her ambitions to materialize without exertion. Born into a family of artists, she became fascinated from childhood with the Edo-period master Katsushika Hokusai, aspiring to become his successor. This fuels her ambition, yet her initial approach seeks shortcuts.

Her personality blends sociability, quick wit, and adaptability with analytical thinking, rationality, and moments of social detachment. She displays traits associated with classifications like ENTP (creativity, improvisation) and ISTJ or Enneagram Type 5w6 (intense curiosity, thirst for knowledge, cautious withdrawal to process information), reflecting a complex mix of extroversion and introspection, rationality and creativity.

A pivotal shift occurs when she encounters the painter god Raijin in a dream and voices her wish for easy achievement. Raijin summons historical Japanese artists—Korin Ogata, Yuichi Takahashi, and Eitoku Kano—to mentor her across time, forcing her to confront her aversion to hard work. She initially clashes with teaching styles prioritizing creativity over technical precision, especially Hokusai's unorthodox methods. Her early focus remains on mastering technique, often neglecting creative exploration.

Guided by these mentors, Tenkorin evolves. She gradually shifts from seeking shortcuts to embracing disciplined effort, aiming to win a national drawing competition through dedicated practice. This journey involves reconciling her technical diligence with newfound creative freedom, learning to value originality and emotional expression. Her rivalry with Kanon Kano further pushes her to refine her skills and artistic vision. By engaging with diverse artistic philosophies from the masters, she cultivates a holistic understanding of art, striving to forge her own identity as a painter capable of blending technical proficiency with imaginative innovation.