The fourth book in the “Imouto Series”.

1. Imouto Futari (義妹二人); Comic Penguin Club 2013-11
2. Imouto Gisou Koibito (義妹偽装恋人); Comic Penguin Club 2013-12
3. Imouto Hanayome Shuugyouchuu (義妹花嫁修業中); Comic Penguin Club 2014-01
4. Imouto Date Quest (義妹デートクエスト); Comic Penguin Club 2014-04
5. Imou...