Musaigen no Phantom World: Mizutama no Kiseki

A summer trip to the seaside turns into an unexpected job for the students of Hosea Academy. Haruhiko would rather spend the break indoors with his books, but the beach and his friends quickly give him reasons to reconsider. Once the group arrives, the people running their lodging explain that a phantom has recently begun frightening visitors away and offer free food and accommodation if the students can deal with it. What should have been an easy vacation becomes another hunt for a troublesome supernatural creature, with the relaxed summer atmosphere giving way to the kind of strange incidents that seem to follow the team wherever they go.