Ai Shimai games in order

All 4 games of the Ai Shimai series in the order they came out, from Immoral Sisters (1994) to Ai Shimai IV: Kuyashikute Kimochi Yokatta Nante Ienai (2014).

1. Immoral SistersPC-98, FM Towns, DOS +1
   30 Sep
2. Ai Shimai Tsubomi... Kegashite KudasaiPC · Silky's
   26 Mar
3. Ai Shimai: Docchi ni Suru no!!PC · Silky's
   27 Oct
4. Ai Shimai IV: Kuyashikute Kimochi Yokatta Nante IenaiPC · Silky's
   25 Apr