
Why did they even start living together I don't remember

because yu's shop/house is under renovation, he was gonna go back to his hometown with the rest of his family (mie) but takamada convinced him to rent a place together in tokyo saying mie was too far away from the shop plus it would be hard to hook up. yu accepted because "he couldn't jerk off at this grandma's house" or somethin

For anyone wondering why his dick is bumpy: it's a body modifications called pearling or genital beading , it's beads made of silicon or titanium that are inserted under the skin. And apparently it's common for Yakuza to get these beads to signify each year they have been in prison??? Don't know if the author added that detail bc of this reason or they just thought it was freaky lmao
Wait what happened to the plot point of somebody hiring that hitman to kill lee won? Why is he just chilling at his house? Lmao