Been a while since I had seen an old school shoujo style story like this.
These types of arcs, where the main female character is romantically tempted by creepy dudes was pretty common in shoujos back in the day.
I have seen these lines in "cutesy" shoujo manga way too many times, when a creepazoid makes his moves on the main female character in shoujos:
"My heart belongs to [GENERIC BISHONEN], but yet I...!
Why can't I resist [GENERIC RAPEY GUY] ...!?
My body won't listen to me...!
Save me [GENERIC BISHONEN]!"
These days people just cry "NTR BAIT!!!!" whenever this happens, so this fad has died off for the most part. (Not in hentai though...)
Honestly, I don't miss these types of crappy plot devices at all.