I was confused by the tags at first because it seemed like the bulk of this was Tsuki flirting with Chika.

[norman rockwell freedom of speech guy] I believe that Tsuki should have a threesome wi

How does it feel to treat me like you do?

the fact that they're cousins are making this spicier

This chapter has me fully convinced that Tsuki is playing wingwoman

Riko is sooooooo fed up with those three