Genre: Mystery

Watanuki investigates a classmate of his who started to behave strangely since a pair of wings started to grow from her back.

It's summer and the gang decides to spend some days in a house by the beach. For some reason Doumeki keeps asking Watanuki to call for his help, but he can't figure out why. Unbeknownst to them, there's a ghost lurking inside. When Watanuki discovers this, will he investigate alone?

When a Zashiki-warashi accidentally steals Doumeki's soul, Watanuki has to go after her to get it back, aloof to what are her true intentions.

Yūko decides to arrange a ghost stories meeting with Watanuki and his friends.