Actually, I Am

Let's Go to the Summer Festival! (1x11)

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Asahi and Nagisa were invited by Youko, Shimada, Oka, and Sakura (respectively) to the Summer Festival; however, Youko tricked them into together on them spending an exciting time 'alone together'. Youko and Shiho follow Asahi and Nagisa around to watch what they do together. Asahi, tying to make the atmosphere less awkward, invites Nagisa to play at the shooting gallery. Youko becomes flustered while watching the two of them play, and loses track of where they went. Soon after, Mikan shows up with her two little brothers and helps the two of them look for Asahi and Nagisa. Soon after they find the two of them, Nagisa trips and falls onto Asahi, then realizing her love for him!