Hitotsu no Tairiku no Monogatari: Allison to Will to Lillia to Treize to Meg to Seron to Sono Hoka

After Allison sees off Major Travas on his trip, the plane he was on explodes and crashes.
Meanwhile, the members of the newspaper club of the academy Lillia attends begin their investigation on the 'mysterious transfer student' Treize. Upon coming across a strange phenomenon around the school lockers, they gradually get engulfed in a huge incident.
Join the characters of the Allison series as they take their final bow in this two-volume adventure and school life story combined into one!