Senpai! Waza to ja Nain desu!

A high school girl named Sachi begins dating Jun, a senior in the same school after confessing her feelings to him. Following their relationship's start, Sachi often finds herself in awkward, embarrassing situations. One instance occurs when she attempts to hold his hand for the first time but accidentally reaches into his pants and touches an unintended object. The story presents a lighthearted romantic comedy centered around the couple's innocent yet clumsy interactions.