I Can't Refuse S manga volume 6 features story and art by Ai Hibiki.

Miku has at last been reunited with her beloved butler. Having successfully repaid her father's debts, Miku is free to pursue a relationship with her spicy instructor. When she embraces her true self and approaches Kamishiro as his equal rather than as his student, sparks fly! Sharing intimacies with one's true love is hotter than any other time before… Will Kamishiro have Miku falling apart under his hand?

FINAL VOLUME