Looking for a specific smutty manga

It's a josei, smut, and it follows two childhood friend but as grown ups. She is very busty and has an office job and it's a bit older than him. He looks a bit unkempt and has a bad reputation as lazy and hangs out with a bad crowd. But he is a nice guy and they have this dynamic where she used to look out for him as kids and now they are not kids anymore