A Bacillus natto culture is treated with chitosan, and then filtered, concentrated, and dried. The polymer compositions include epoxy resin systems and a dual curing system including one or more curing agents containing one or more hydrazine-based curing agents having hydrazine functional groups and one or more amine-based curing agents containing one or more amine functional groups. Thereafter, with an immersion liquid provided on the barrier film, pattern exposure is carried out by selectively irradiating the resist film with exposing light through the barrier film. The shared game is synchronized between the multiple users for playing the shared game against one another.