Giri no Imouto Nara Dekiai Shichau?

Sixth book in the “Imouto Series”. 1. Imouto wa Bukiyou (義妹は不器用); Comic Penguin Club 2015-11 2. Imouto Drive (義妹ドライブ); Comic Penguin Club 2016-04 3. Imouto Sabotage (義妹サボダージュ); Comic Penguin Club 2016-06 4. Imouto Nidome no Nidone (義妹二度目の二度寝); Comic Penguin Club 2016-07 5. Imouto Mermaid (義妹マーメイド); Comic Penguin Club 2015-10 6. Imouto Suiminbusoku (義妹睡眠不足); Comic Penguin Club 2016-02 7. Imouto Kitakubu (義妹帰宅部); Comic Penguin Club 2016-03 8. Imouto Mis-match (義妹ミスマッチ); Comic Penguin Club 2016-05 9. Imouto Kikan Genkaiten (義妹帰還限界点); Comic Penguin Club 2016-01