One idea could be that the two best friends enter into this 'with benefits' relationship secretly, but then they start to develop real romantic feelings. For example, they might find themselves getting jealous when the other is with someone else. Another idea is that they decide to end the benefits part but struggle to go back to just being plain friends because the physical aspect has changed their dynamic so much.
Well, a cool fanfic idea could be that they set some really strict rules at the beginning of their 'friends with benefits' arrangement. Like, no staying over after a night together or no kissing on the lips. But as time goes on, they start to break those rules one by one. This could lead to a lot of interesting drama and internal conflict within the characters as they wonder what it all means.
A possible fanfic idea is that the friends with benefits situation starts because of a bet or a dare. Maybe one of their friends dared them to try it out. But then they find that they actually enjoy the closeness more than they expected. However, they also have to deal with the potential fallout in their friend group if others find out.
Chapter 266 is the strongest chapter-level answer because it starts from Upon hearing this, the deputy director's expression also turned serious. and follows through on Now I see why Jiang Li despises her brother so much, utterly unreliable!"....
The best chapter pointer here is Chapter 265, "This Time You Must Help Me". It opens with As expected, the truth behind the video was unearthed one by one and... and closes on Miss Su, I also don't know why things turned out this way..." "Heh, you....
If you want the clearest chapter reference, go to Chapter 264. Early on, Jiang Li first reassured her mother, then opened the chat box with Shen...; later, the chapter leans on She had just sent a message when Shen Lan's video call came through..
A practical answer is Chapter 221, because it turns the idea into a concrete scene. The chapter opens with Many agricultural students found themselves with tears brimming in their..., adds pressure through Whoever sells the most will get more corresponding good scores." "Those..., and ends on As a.
Look to Chapter 275 for the clearest answer. It begins with Hu Zi was exceptionally cooperative, and within half an hour, all the..., keeps building through The village chief wanted to invite some people to stay for dinner, but..., and lands on Since you two are considering the village, let's use.
The best chapter pointer here is Chapter 260, "Did You Take All These People Down?!". It opens with Yan Dabiao, who deeply felt the sting of deception, flew into a rage and... and closes on However, if this situation arises again, you can't act so rashly..
Look to Chapter 285 for the clearest answer. It begins with He could distinctly feel his back rubbing intimately against the ground..., keeps building through Whizzing noises frolicked by his ears— buzzing insects, the rustle of..., and lands on Fortunately, the Mystical Skill of Xuan Sect also.
Look to Chapter 230 for the clearest answer. It begins with Shang Shaojing's expression wasn't looking too good either., keeps building through He had always been the winner in any field, and there had never been an..., and lands on If he knew that your stepmother was secretly prompting you.
A practical answer is Chapter 235, because it turns the idea into a concrete scene. The chapter opens with Chasing Wind Youth was clearly becoming anxious, and as a result, his..., adds pressure through Don't worry, I will follow you from behind., and ends on Indeed, he had endured many accidents.
The best chapter pointer here is Chapter 232, "He's a Pure Man! Purebred!". It opens with But soon, she suppressed this strange feeling and slowly began to speak,... and closes on The moment he saw the information come through, Jiang Li fell silent..