Just A Sunbae I Know

Jun-Woo wakes up in the morning and next to him, in his natural state (?) is his sunbae?!! It’s true that they’re dating, and it’s great to see how enthusiastic sunbae is, but!! Isn’t this mature style of dating (?) too much? Caught between pure love and sexual love, are we fine like this, sunbae? (Source: Bomtoon, translated)