Yūto and Haruka attend the summer Comiket convention together, but since it is the first time for both of them, they underestimate the massive scale and hoards of people who attend. Mika, Hazuki, and Nanami tag along in disguise and help Haruka obtain a dōjinshi she wanted, and to get her out of trouble when people started taking pictures of her. Yūto and Haruka grow closer throughout the day, but after he leaves her at her house, Yūto is asked if he and Haruka were followed by anyone at the convention, but he says he did not see anyone like that. That night, a frantic Haruka unexpectedly shows up at Yūto's house.
春香が楽しみにしていた夏のコミケがやってきた。会場へ到着した裕人は、帰省ラッシュをも上回る混雑ぶりと地の果てまで続くかのような長蛇の列に呆然。春香もコミケ初体験で混雑ぶりに仰天するが、興味をそそる同人誌がそこここにあり目を輝かせる。そして二人は、春香のお目当ての超有名サークルへ真っ先に向かうが…。
마침내 애니메이션 마니아들의 최대 축제인 '여름 코믹' 행사날이 다가온다. 노부나가는 유토에게 '여름 코믹 대책 매뉴얼'을 보여 주며 전날에는 일찍 자고, 반드시 다음날 첫차를 타고 가라고 충고한다.
