Ep. 7: Distant FrFr!

7

Rin pointed out that he had never heard Haru laugh. Makoto states that he had during elementary school but also said it was a scary laugh (sleep talk). Rin suddenly grabs Haru and tells the rest to tickle him. Just as they do it, Haru bursts out laughing. Everyone gets shocked and then hugs Haru. (Source: Free! Wikia)