Nanasaki Ai Arc, Final Chapter: Confession - S1.E16

As Tsukasa formally opens the Founder's Festival, Junichi is helping Ai out at the Swim Club's oden food cart, where they sell out their wares, even gaining praise from the Tea Club. At the end of the festival, Ai takes Junichi to a hill with a hot spring owned by her grandfather. As the two are practically naked in the hot spring, Ai confesses her feelings for Junichi, which he also confesses his feelings for her as well, and kisses her. In the epilogue, Junichi rests on Ai's lap while watching the sunset at the same beach where they first ate Ōbanyaki together.