In Onii-chan, Asa made Zutto Gyutte Shite! Episode 4, the sweet, heartwarming sibling antics take a surprising turn as the bond between Haruki and his younger sister, Mio, deepens in unexpected ways. The episode begins with Mio preparing a heartfelt surprise for Haruki, wanting to express her gratitude for his constant support. However, her clumsy yet adorable efforts lead to a series of comedic mishaps that keep the audience laughing while tugging at their heartstrings.
As the day unfolds, Haruki and Mio find themselves caught up in a local festival, where they are drawn into a spirited competition. Through teamwork, shared laughs, and a touch of sibling rivalry, the two grow closer, with moments of quiet vulnerability revealing how much they rely on each other. A poignant flashback hints at the challenges they’ve faced together, adding emotional weight to their playful dynamic.