I use this BB cream.

This is the Missha Choboyang BB Cream, which has been around for several years. I've lost count of how many years I've been using this. I usually just apply sunscreen and this BB cream when I go out. It has surprisingly good coverage, so it's great for a light application without needing concealer or foundation. On those occasional days when I'm feeling lazy, I mix sunscreen and BB cream, or BB cream and foundation, and just quickly apply it before heading out. Since I tend to do my makeup casually, I prefer things to be simple, and this BB cream was just perfect for me.