Koibito Doushi ni Natta Koakuma Imouto to Icha Love H

Together with the spoiled and mischievous stepsister who loves me...
This is the R-18 sequel for the manga Ore no Ie no Koakuma Imouto depicting them after the ending of the main story.
This work can be enjoyed by itself, but if you read the preceding series you may enjoy this even more.
(Source: DLsite, translated)
Note: Released at Comiket 102.