Nothing special happens this chapter; another character is briefly introduced. Series is pretty much getting milked.
Read this on release a couple days away so my memory may be a bit off but bascially, (Natsumori Kyoko?) cleaner lady is told about the swapping the two couples do (whilst Komiyama and Yukari have sex) and that Seiji is also doing Komiyama's partner (Risa). She wants to do it with Seiji but Yukari says no because she needs to bring a partner to swap else it is cheating/affair. So she gets with the (Shimizu Masato?) cleaner guy to have sex with him, aiming to use him so she can have sex with Seiji. When meeting up with Masato she sees new character (gyaru?Streamer?Celeb? girl: Inui Ai/Mei Ai) and then goes to have sex with him (Kyoko and Masato that is). Last two pages is Ai on phone with her unfaithful partner. I didn't really read it properly just quick skimming.
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p.9 the top panel she asked the other guy she work for to be her lover, the bottom panel is the reason she asked him to be her lover "cause with a lover she can do lover exchange so she can have sex with black hair dude." just like my perdition at c.15.
new dude seems not that bad and his dick is not small, that wife gonna give him heart eyes if he pen her for sure. lol
light short hair woman from the beginning seems to be the smallest breast of all the female get fucked in this series... wonder if she come back or kicked off. or next swing she would fuck this new dude while the maid fuck black hair dude.