After Aoi wins in the street lotery a free trip to Kyoto with Subaru, who was going to join the sixth graders' fieldtrip to Kyoto, this increases her neviousness of being with him, even when she's been having misunderstandings and wild imaginations of Subaru being surrounded by kids. It even doesn't go well for Subaru who had a bad day with underwear the whole day: 1) he and Natsuhi had to return Maho's panties while girls were in the bath, and having a pillow fight on the second occasion, which was succesfull; 2) when he accidentally catches Aoi in erotic underwear, given to her by her friends before the trip, which ruins her mood and makes her "feel to die". On their way home, Subaru manages to brighten Aoi's spirit up by giving a hairpin for being the fifth graders' coach.
智花たち6年生のビッグイベント、京都への修学旅行がやって来た。しかもテスト休み中の昴と葵も、偶然にも京都旅行を福引きで引き当てたために同行出来ることになった。智花たちはもちろん大喜び。昴に気のある葵も内心嬉しさいっぱいだったが、実際は引率者状態でビミョーな状況。それでも昴との旅行を大いに楽しむ。さらにホテルの都合で彼と同室という展開に、葵はもうドギマギだ。一方昴は、その夜ホテルの廊下で真帆のパンツを拾ってしまい違った意味でドギマギ。そのパンツは元々は夏陽が拾ったのだが、返しそびれて昴に改めて拾わせたのだ。果たして昴は、夏陽と協力して真帆のパンツを人知れず返すミッションを遂行することに。
