I thought that it was the trope of girl sneaks into your room, finds erotic books (I still don't get why anyone would have those in this day and age), and loudly sings their titles. Because those lyrics really didn't look like song-lyrics... Was rather surprised when they were.
Also, the font and positioning was very poorly picked there, almost impossible to read large parts of those bubbles.
If they became a couple at the end I'm completely going to lose my shit. Just imagine, falling in love with the person who had been teasing you, tickling you, toying with you, making your heart flutter all in the name of amusement.
I don't know if it's just what I've been reading lately or not, but I'm getting really tired of useless MCs. You could replace them with a literal cardboard cut out and the story wouldn't change at all.