Mission: Yozakura Family Vol. 22 — Manga Raw / Buy Official

Kyoichiro, Hifumi, and Alpha reach an uninhabited island in the Arctic Sea in search of Nanao. When they finally find him, they discover his body can no longer leave the research facility he sealed himself inside. Dubbing the building the "Nanao Dungeon," the trio launches an operation to break through its layered traps and rescue him. The twins, thrilled by their first real mission, throw themselves into the impregnable lab under Kyoichiro's command, wielding family bonds as their weapon.