It's time for the exams for Tokyo University, and unfortunately, both Keitaro and Naru fail. Disappointed, they go their own separate ways to take a break from Hinata Inn. Or do they?

After witnessing Keitaro almost kiss Naru, Shinobu wonders what a kiss is like. Supposedly, it tastes like a lemon and is as soft as a marshmallow and thus begins Shinobu's quest for her first kiss.

Seta has to leave on an excavation trip and asks if Sara can stay with the girls at the inn. Sara doesn't take too kindly to this and decides to run away while causing as much trouble as she can to everybody else.