Help me find this manga please

I cannot remember the name to save my life! There's the uke and seme. The seme is a giant dude with black hair and he goes to college with the uke who's older than him. The uke only wants sex and skipped a couple of years because of his ex. The uke has a mental disorder where they have to have a lot of sex or something. The seme gets a black tattoo from his older gangster brother on his neck and arm to make him look cooler to the uke. That's pretty much all I can remember if someone can please help me.