Sure I’ll tell you some! To anyone reading there’s gonna be major volume 7 spoilers ahead so be warned!
So volume 7 involves the person that was shown in the prologue chapter in vol 6. He’s a non-binary person names Ivanov Knight, and is the (nephew?) if someone in the Yakuza. He discovered Chunta ok TV and immediately fell I love with him. I think he saw Takato on tv acting with Chunta and decided he would take his place, so he entered the new (drama?) that Takato is doing. Ayagi is also in this drama as well. Also, for some unknown reason throughout the whole volume Chunta is not having sex with Takato. There is also a chapter dedicated to Arisu and Usaka, and it’s about how they first met in college. There is a short sex scene between them at the end. There is also another character from the Yakuza, I didn’t catch his name, that is like Ivanovs Manager. He’s hellbent on granting Ivanovs wish of being with Chunta, so he doesn’t everything he can to achieve it. He’s shown at the end holding an aphrodisiac, and is planning to give it to Chunta. My Japanese isn’t really good so hopefully this all correct. I hope this helps ^^

Oh man I’m rereading and let me just say that volume 7 is a heck of a ride... Also spoiler warning
Volume 7 ends on a cliffhanger so expect a volume 8 to (maybe) finish the Arc about the person mentioned in the prologue