Kazuya Uesugi, who lost his parents when he was young, was adopted by the Nakano family and became the "brother" of the quintuplets.
From the hectic childhood care to the ignorant emotions in adolescence, he clumsily and tenderly guarded the five sisters with different personalities, integrating his broken heart into this noisy but warm home.
Ichika's dependence, Nino's arrogance, Sanjiu's tranquility, Yotsuba's vitality, May's earnestness...
In the steady flow of daily life, the sisters are quietly transforming, and the "family affection" he protects blooms into a future called "love" when the cherry blossoms fall.
