Senpai! Waza to ja Nain desu!

Sachi, a high school girl, confessed her love to Jun, a senior a year above her, and they are finally going out! However, ever since then, Sachi has had a tendency for lucky-pervert moments...!? Like when Sachi tried to hold his hand for the first time, she accidentally put her hand in his pants and ends up grabbing on to something else instead....