It's a Netori game, mc steals his friends' girlfriends and also his own sister.

Support the author:
https://www.dlsite.com/maniax/work/=/product_id/RJ01030330.html

Base +12, wavedash +21

vndb doesn't have this listed:

Apparently, there the group is called "Milk Shake"

and the other game covers resemble this one

I just checked the dlsite link

apparently that site now blocks US region access (for some Ech works) like pixiv does now (for all Ech works), this is getting out of hand!

Does anyone care to post dlsite plot summary and Character list? such as who is his sister?

p.122-133 Glasses Brunette Pregnant

Base +7, BobSagetkitty +6

(I'm also curious about why I do not see tachie (standing pictures) for the pregnant glasses-wearing character.)

Base +15

@Comrade Claus sister is the blonde one

Base +12

footjob 130

Base +2, jessica702 +14, Nelath +6