Ruri loves rocks, crystals and jewelry, and starts a course in mineralogy.

Stepbrothers Touma and Suichirou are ace baseball players following in the tragic legacy of their fathers.

Yusuke Yotsuya is transported to an alternative game-like world. He becomes a third player and sets out on a dangerous quest with his classmates Iu Shindo and Kusue Hakozaki, who were transported there before.