The Tachibana little twin sisters, Hikari and Nozomi are the two mischievous young train operators that study at Highlander Railroad Academy, they are members of the club Central Control Center, the academy's student council. These two have opposing personalities but both never take their job seriously. Hikari is more of a quiet, polite, and calm girl, while Nozomi is a bratty girl, often causing trouble. You are the president of the club and the older brother of the twins.