Secret x Siblings

Shirosaki Rinko is a high school girl with a genuine and boundless affection for children. Driven by this passion, she regularly volunteers her time to help out at the local kindergarten where her younger brother is currently enrolled. Her daily routine takes an unexpected turn during her walks home from the facility, where she repeatedly crosses paths with two striking classmates. The first is Tsuga, a boy whose fierce, intimidating appearance marks him as a delinquent. The second is Mogami, a bespectacled young man who carries himself with a cool yet distinctly unapproachable aura that seems to radiate disdain. At first glance, these three individuals appear to have absolutely nothing in common, existing in entirely separate social spheres. However, beneath the surface of their seemingly unrelated lives lies a hidden connection that defies expectations. As their paths continue to intertwine, the unlikely trio finds themselves drawn into a shared dynamic that challenges everything they thought they knew about one another. Presented in an engaging four-panel format, the story unfolds as a unique youth comedy centered around the unexpected trials and heartwarming moments of parenting and growing up together.