Please buy the original work to support the artist.
http://www.dlsite.com/ecchi-eng/work/=/product_id/RE139123.html

Is image #2 referring to a new game? Tried to google 宮長ありさ and 疾漢の極み but nothing came up.

Base +6, ryugamix +4

@Thanks: Yes, that image is for their next game (well, next next since they have Tricks of Treats for October scheduled)

On the doujin itself, is that the little sister? She looks a lot more mellow than in the game o_O

Although based on the last 2 pages, it seems to be after the game (she knows the guy and 'punish' him for pulling that prank on her)

Base +6, ryugamix +4

Too many repeats and the censor, otherwise this is absolutely amazing.

Base +5, ryugamix -4, popioo1234 -6, Huy +6, pesmerga1983 -9