Dakota's activites

It had multiple stories but I can only remember the one, the uke and seme are living together and the uke is more obviously possessive of the seme. But while they're eating the seme reveals that it takes a certain about of years for all your cells to regrow which means the the uke's body is made of things that the seme fed him. Meaning that the uke belongs to the seme. Sorry if this doesn't make sense, my memory isn't always great.

I'm looking for a manga about an Idol group where the singer starts dating a dancer (?) At one point the dancer injures his arm/wrist and later the singer hyperventilates during a show and the dancer kissed him? Please help if you can ^^