@Taerene
My bet is she is the top up until they actually start, then he gets focused.
From what I can see, she is way more extroverted, but her personality does not fit a top per say (as it was kind of hinted towards given her reaction when he called her beautiful while half asleep). On the other hand, he definetly wont be the one who initiates spontaneously unless he isnt in a right state of mind. He will only do it when things are already moving towards sex in the first place. However, he will come prepared, with hours of research so that if needed, he has something to fall back on.
That being said, these two are not idiots. I bet she is doing most of this stuff intentionally, since she already discovered that she likes him. She went to his house and takes a shower first thing. Now she may have done that because it is hot, but she also put on full body foundation and knew it would be hot. Plus she said she would need to reapply it which makes putting it on in the first place questionable. Likely it was an excuse to let her shower. And if she was planning to take a shower, she would have brought a spare set of clothes and showering things. Unless, she wanted to use his stuff and wanted to wear his clothes.
Goujo may need 1 or 2 more subtle hints until he realizes it, but it shouldn't be much longer.