Help?

I’m looking for a bl manga by the same artist/author. One of the stories has the main characters s childhood friends, one day the mc best friend told him he had a bf. The mc gets upset and asks the ml why it couldn’t be him (the bf). The childhood best friend then basically comes onto him and I don’t remember to much more but they end up a couple. There is one scene I remember where the ml becomes another guys muse ie he sculptures him. This causes drama between the main couple as the artist very clearly desires the ml so the mc gets very upset.
Then another story by the same author and artist- school bully with blond hair who’s rich bully’s school nerd, they get into a fwb type relationship and they end up together as a couple. As the relationship goes on the ml dyes his hair back to black so that he doesn’t look like a thug, he even removes his piercings and eventually becomes a model. He was very well known for being the IT seme for a long time before jinx etc.