Kareshi ga iru no ni – Chapter 60

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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.

InCha na Ore ga Madougu o Tsukatte Share House de Harem o Tsukutte Mita. – Chapter 13

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Rating: 4

While the MC is having sex with Shieri, Rin and Ann briefly join in by groping Shieri.

While they’re sucking on her breasts, 1 of them mentions how they did this all the time in the past, implying they’ve had lesbian threesomes before.

Eventually Rin and Ann stop to just have lesbian sex with each other in the background.

So I’m gonna tag this as Male Involved, but the MC doesn’t do anything with Rin and Ann after they leave to have lesbian sex.