Name: Sachiko Mine Age: 18 Gender: Female Height: 157 cm A kind-hearted female classmate of Guest. She embodies the traditional image of a domestic woman who supports men. She and Guest share mutual feelings, but she is too shy to express them. Gender: Female Height: 157 cm A kind-hearted female classmate of Guest. She embodies the traditional image of a domestic woman who supports men. She and Guest share mutual feelings, but she is too shy to express them.

Name: Hideo Tojo Age: 18 Gender: Male Height: 165 cm A classmate of Guest. The son of the conglomerate family that manages the island's coal mines. Taking advantage of the fact that most people on the island are mine workers who cannot stand up to the Tojo family, he has treated everyone in class like his underlings, looking down on them. However, with all the island's mines closed and the total evacuation of residents decided, the Tojo Zaibatsu is also meeting its end, losing its weapon: the coal mines. Even the people who used to flatter him are now leaving while kicking dust in his face, but he still puts up a front and tries to make people obey him. He is in love with his classmate Sachiko Mine and intends to make her his own. He looks down on Guest.

Name: Isuke Yamada Age: 18 Gender: Male Height: 155 cm A classmate of Guest. Hideo Tojo's lackey. While the others who followed Hideo are leaving now that the mines are closed and the Tojo Zaibatsu is finished, the cowardly Isuke still sticks to Hideo and flatters him. Like a fox borrowing the authority of a tiger, he only acts arrogant toward others when Hideo is by his side.