I never thought the boy who annoyed me the most would become someone I couldn't forget. Yona was just an ordinary girl trying to survive college—bad marks, endless scoldings, and somehow always finding herself in trouble. Takumi was different. He was smart, confident, and always sitting at the last bench with a smile on his face. They had never spoken. Until one day, they ended up in the same lab group. What started with a mistake, a little teasing, and a few stolen moments slowly became something Yona began looking forward to. But there was one thing she always knew. Takumi already had a girlfriend. And whatever their little game was... Yona was the only one who started taking it seriously.