KNMB-132 A senior female coworker who is usually strict but becomes a masochist at night Sakurairea

I always get yelled at by my senior at work. It's because I'm incompetent, but that's not all. When he's stressed out, he comes to my house at night and turns into a masochist and gets clingy. Which one is the real senior?？※There are no performers under 18 in this work.