Dear Stage week returns this year to Prince Hotel Shinagawa Club X. The dates for Dear Stage week will be the 26th to the 1st of April 2018. The week will feature special performances by performances by Dear Stage members, including Pinky Ayane and Eitaso of Dempagumi inc. and Nemoto Nagi of both Dempagumi and Niji no Conquistador.
Tickets are 5940 for individual shows or 37800 for a week pass.
Here is the official site for Dear Stage Week.