Aneki... My Sweet Elder Sister - Season 1

Based on the manga by Yoshu Ohepe. Takumi is constantly preoccupied with thoughts of Saki-senpai, whose curvaceous figure is impossible to ignore. An initial conversation on a train leads to a friendly acquaintance. He frequently gazes at her, which inevitably results in his arousal. Their interaction progresses when he discovers they share a particular kink, marking the start of their narrative.