Chained Soldier manga volume 4 features story by Takahiro and art by Yohei Takemura.

Tenka, the boss of the sixth squad, gathers her courage and asks Yuuki out, but unfortunately, he’s too perplexed to reply! Meanwhile, the seventh squad needs the assistance of Yuuki's abilities in their fight against a demon that's only getting stronger by the minute! And to make matters worse, a new enemy’s about to enter the fray…