13화: 하루는 친구들을 위해 흔적을 남기며 신비로운 반딧불이를 찾습니다.
As usual, Shizuku is studying when suddenly Haru barges into her room through window. Haru asks Shizuku if she has seen "him". Shizuku doesn't understand what Haru means by "him" (because Yoshida doesn't explain what or who is "him") and asks Yoshida to calm down and explain everything. Haru replies to Shizuku by saying that he wants to keep it a secret and goes away, leaving his phone behind. Then, Haru encounters all of his friends when searching for "him" while always leaving something behind. Later that day, Yu meets Nagoya, Haru's rooster and brings it to Haru's house, where she meets all of Haru's friends who want to return everything that Haru left behind. It's at this point that everyone believes that what Haru is looking for is Nagoya. When everybody goes searching for Haru to tell him about Nagoya, Shizuku abruptly leaves them and goes home. On her way home, she meets Haru, who tells her that it isn't Nagoya who is he searching for. Haru tells Shizuku that he is searching for a glowing firefly. Unsure about Haru's statement, since there aren't any fireflies during winter, the two of them suddenly see the firefly. Haru then states that the reason he wants to search for this firefly is because he actually wants to see the firefly together with Shizuku. Shizuku notes that there are still many stories to be told, about both her friends and Haru. The epilogue shows that Yu is still waiting at Haru's house with Nagoya when she encounters Haru and Mitsuyoshi, both of whom are just coming home. (Source: Wikipedia)