Kashou Minaduki, heir to a centuries-old lineage of Japanese confectioners, rebels against the rigid expectations imposed by his father, who enforces relentless training in traditional wagashi. Seeking escape, he flees to France, where a chance encounter with a patisserie ignites his passion for Western desserts, reshaping his purpose: to craft sweets that spark happiness. Defying familial duty, he abandons his heritage, secretly establishing La Soleil bakery to forge his own path.

Months prior to the bakery’s opening, fate intervenes when he and his sister Shigure rescue Chocola and Vanilla—orphaned catgirls left vulnerable in a storm. Though hesitant, Kashou shelters them, devotedly nurturing their recovery until they become inseparable from the Minaduki household. Determined to build independence, he departs home, only to discover the pair smuggled into his new life. Reluctantly, he accepts their unwavering loyalty, allowing them to remain as both companions and eventual employees.

Calm and compassionate, Kashou anchors the catgirls through emotional turmoil, yet remains oblivious to their affectionate overtures. His obsession with perfecting recipes fuels innovation, though he grapples with maintaining boundaries between mentorship and personal attachment. Initially uncertain about balancing bakery duties with guardianship, he gradually acknowledges their value, guiding them through trials like securing independence permits and navigating adulthood.

Shigure, his sister, complicates his life with unreciprocated romantic longing, their bond strained yet pragmatic. While deflecting her advances, he leans on her marketing expertise to promote La Soleil. As additional catgirls from the Minaduki estate join the bakery, Kashou mediates clashes—mending Azuki and Coconut’s rivalry, encouraging Maple’s ambitions—steadily evolving from caretaker to trusted leader.

A defining moment arrives during a tense family visit, where Kashou challenges his father to validate his patissier skills. Humbled by the elder’s mastery, the encounter fuels his determination to hone his craft while cautiously mending their fractured relationship. His journey weaves self-doubt into resilience, blending tradition with innovation, and duty with emotional vulnerability.

Through shared milestones—Christmas celebrations, navigating the catgirls’ heat cycles, mentoring them through bell exams—Kashou’s perspective shifts. He transitions from seeing them as charges to respecting their autonomy, deepening bonds forged in mutual growth. His narrative arcs from rebellion to reconciliation, ambition to empathy, etching a legacy where passion, family, and found kinship converge.