You Call That Service?, Vol. 6 (light novel) — Kisetsu Morita

A Big Decision for Shiren…Shiren receives a letter from her mother promising to whisk her away so the two can start a new life together back in Japan. The thing is, her mother is a wanted criminal in the empire, and now she's taken control of the Virginal Father! Despite her vocal refusals, Shiren may be more tempted by this offer than she's letting on… Meanwhile, Ouka surprises everyone with a dramatic proposal for Ryouta should Shiren change her mind.