Lycoris Recoil, Vol. 4 (manga)

After a fun day off, Chisato and Takina are back on Lycoris duty! Their latest objective is to guard and guide the elderly Mr. Matsushita on one last tour of Tokyo, but this seemingly straightforward mission might prove harder than it looks... With terrorists on the loose in the city and the mysterious Alan Institute rearing its head, can Chisato and Takina successfully finish the job?!