Senpai! I Didn't Do It On Purpose!Senpai! Waza to ja Nai n desu!; センパイ！わざとじゃないんです！; Senpai! Wazato Janain desu!; Я не специально, сэмпай!; Senpai! I Didn't Do It on Purpose!; 學長！我不是故意的！; 学长！我不是故意的！

Sachi, a high school student, is confessed to by her love Jun, a senior who is a year older than her, and they are finally going out! However, as soon as she realizes that she is in love with Jun, Sachi has a constitution that causes her to have lucky-perv incidents with him every chance she gets! When Sachi tries to hold his hand for the first time, she accidentally puts her hand down his pants and ends up deeply misunderstanding Jun when he asks her to pull out her hand. It's an erokawaii☆lovecomdey.