[ Anime XXX ] Last Waltz 02

It was intended to be a simple summer training session.... Yuki is the baseball club's caretaker. She and the other members are currently residing on the isolated island at a training camp. However, a civil war breaks out one day. Male educators depart the island to ascertain what is happening. They never return, however. They discover their ship has sunk several days later. There is nothing to drink.... There is nothing to eat.... They progressively lose their capacity to control themselves....