My prediction is that in the next chapter or two she'll have sex with the boyfriend but will notice that he has a smaller dick – always smaller because reasons – and she either keeps cheating on him or dumps him for the senpai. I hope my prediction is wrong, but as of late a lot of authors keep rehashing the same type of development over and over again without adding some creativity to the story.
@Forgunia I think the Japanese NTR Toilers Ring (or J-NTR for short) are going to break his legs if he doesn't do that all NTR doujins have to be done the same exact way nowadays bro.