Hatsukoi Killer Kouryaku Keikaku

Sumi is a fifth grader navigating the awkward early stages of puberty, and life has just taken an exciting turn. They are currently staying at the home of their very first crush, an older girl affectionately known as Kii nee-chan. Determined to make a lasting impression, Sumi devises a careful strategy to showcase a cooler, more mature version of themselves. However, every attempt to act like a sophisticated grown-up inevitably goes awry, causing their grand plans to backfire in the most unexpected ways. Instead of looking cool, Sumi constantly finds themselves overwhelmed by Kii's commanding and affectionate presence. Whether they are being teased or genuinely rescued from their own clumsy missteps, this overpowering older sister figure always manages to take control of the situation. Sumi’s desperate efforts to win her heart only lead to further endearing chaos within the household. This heartwarming domestic comedy thrives on the humorous gap between Sumi’s earnest ambitions and their reality. Brimming with overflowing affection and lighthearted family dynamics, the story follows the daily mishaps of a young protagonist who simply cannot outsmart their beloved crush.