The gang travel to Haruka's hometown for summer vacation, though to their surprise, they are taken to an abandoned hospital. After being chased by some supposed monsters, they discover the hospital is actually part of a theme park Zenzou made for Haruka's arrival. The next day, the gang head to a private beach, where Haruka ends up getting pulled out to sea, prompting Yoshihisa to rescue her. After sharing lunch together and enjoying some fireworks, Haruka gives her thanks to the others for showing her how fun summer vacation can be. Meanwhile, Haruka's mother, Kumiko, is seen watching them from above.
זה הזמן לטבול בים. חופשת הקיץ הגיעה והחבורה יוצאת לבלות בבית של סבא של קוטורה והרבה מקרים יוצאי דופן קורים (δ ◡ δ).
期末試験も終わり、夏休みがやってきた！ESP研究会のメンバーは、春香の祖父の家に遊びに行くことに。
みんなと一緒の旅行に喜ぶ春香。
田舎の駅に着くと、春香の祖父による盛大な歓迎が待っていた！
海や花火、春香にとって初めてだらけの夏休みが始まる。
