Twin Spica, Volume 07: 11/25/12
Twin Spica Volume 07 by Kou Yaginuma gives Asumi and her friends a chance to bond, reveals the truth behind Marika's illness, and further tests bounds of the students' ingenuity and endurance.
Asumi and her friends vacation in her home town. It brings Marika face to face with memories she knows aren't hers but still have been compelling her throughout her life. When she goes in search of the long forgotten rocket fort at the end of the train tracks, Asumi and the others have to rescue her. That rescue forces her to open up about a huge secret she's been forced to keep to herself.
Each volume, though, has one major piece of training. This time the students are taken to an abandoned prison. There they are broken into three groups and each group is given a deadline by which they must break at least one member of their team out and reach a flag posted outside the prison.
The prison break reminds me most of the first test (the one with the dominoes). The school tests are either one of skill, endurance, or of observation. This one is an observation test, the type of test that Asumi and her team excel at.