Scene features at least 1 guy having sex with 3 or more girls. (Will only have the “Group” tag if the girls involved do things without the guy during the orgy.)
Series Page
Chapter Link (Black & White Version)
Anime Version: Episode 10 Scene 2
Rating: 2
On the sex bus, we very briefly see two of the girls being forced to make out with each other.
Series Page
Chapter Link
Rating: 5
Start of chapter shows Ai, Momo and Tohka in bed nude together, implying they had sex while Haiji went off with Syurina.
Later, all of the girls join them and have an orgy together.
Series Page
Chapter Link
Rating: 3
The chapter starts with Miia having a dream about a harem of Lamias having an orgy with Darling.
Series Page
Chapter Link (Pages 328-330 & 332-351)
Rating: 3
Hina is groped and kissed by Mei and Utsuki, but they get interrupted before they can go any further.
The chapter then proceeds into an orgy with the whole student council.
Series Page
Chapter Link
Rating: 4
Continuation of Ch. 3. Yuri stuff continues to happen in the orgy both with the FMC, and the girls in the background.