Boku wa Konya, Imouto to
Tonight, My Sister and I·僕は今夜、妹と
A brother and sister, Haruichi and Natsumi, share a close relationship that begins to shift as Natsumi enters high school. Haruichi feels threatened by friends growing closer to her, while Natsumi resents her brother for being involved with someone who resembles her. Their bond is tested as emotions complicate their dynamic, leading to a moment where the line between sibling affection and something more becomes blurred.