Jogakkou de Otoko Hitori na node Kousoku de Seiyoku no Hakeguchi ni Sareru Nichijou – Chapter 4 Scene 2

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Chapter Link (Pages 51-64)
Rating: 4

The MC has a foursome with Aoi, Lilliana and Midori.

On Pages 54 & 57, Aoi and Midori are briefly shown having lesbian sex in the background while the MC was having sex with Lilliana.

The MC quickly rejoins afterwards, so it remains a foursome for the rest of the scene.

Kareshi ga iru no ni – Chapter 60

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Raw Chapter Link
Rating: 4

This chapter is about 2 sisters having a threesome together with a random guy.

The long black haired sister is about to get married soon, but she decided to spend the next few months before her marriage doing “naughty things.”

After she catches her sister spying on her going to a hotel with a man that wasn’t her fiancé, she reveals all of this to her and then seduces her into joining them for a threesome.

Tachibana-san-chi no Dansei Jijou – Chapter 4

Series Page
Chapter Link (Pages 175-210)
Rating: 4

Koharu gets seduced and has sex with a male and female masseuse while the MC is passed out next to them.

The 2 workers do not have their names given, but the female one is very intimate with Koharu throughout the “massage.”

At one point, the female masseuse strips and rubs her body against Koharu’s while kissing her neck, causing Koharu to get very turned on and seemingly questioning her own sexuality.

There is colored versions and a few extra pages of art from this scene in this gallery.

Kaikan Change – Chapter 5

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Rating: 5

While the MC is inside the FMC’s body, he takes a bath with her friends. The FMC’s friends are completely unaware about the body switching.

While they’re showing off/comparing their bodies, they start to get turned on and curious about having sex with another girl, so they begin to have a threesome together.

Still unaware that the MC is in the FMC’s body, he tries to say that it would be cheating, but the other 2 girls tell him it’s just a “little friendly play between girls.”